Extorted by writer for 10 pages I didn't want

I replied in a thread with this as well but I think I figured out how to make my own post.

I posted a google doc of an assignment I have (some journal entries) with a pdf of my book for class and asked for help. I'm not sure how this will be received but I posted it to Twitter, publicly, on an nsfw page where some people get off or enjoy doing other's homework for free. Someone made a copy of the assignment I posted, went ahead and did TEN PAGES of it with no payment (or mention of) and they emailed back and forth with me about it with frequent progress updates. I accidentally emailed them via my school email and they are now threatening to contact my school if I don't pay for their work. The word "payment" or "money" was not mentioned until the assignment was completely and irreversibly done. I was not under the impression that they would 1. even do the assignment and 2. would require payment for an assignment they asked my permission to do.

1. I never used the assignment they did or even read it fully over, I did give them the "say so" to do it but it was just a random email from a guy's name and no money was mentioned and I was like 'lol sure do it'. I assumed it was nsfw related to the content I was posting. It was a copy of a real assignment that I needed done at some point but most times I give duplicate work that's past deadline or already done. What I get out of this is sometimes the participants pay ME for the "roleplaying" homework with them.

2. I never submitted an answer to the assignment at at all (and have likely tanked my grade, but that's another issue) especially not the document he sent me. I have had my homework done in the past but I've never paid for or used a writing service.

3. I panicked and sent $20 because he never specified price, and I felt bad for letting him do the assignment when I didn't really want or care about it. I never really had intent to submit it, and from what I did skim it seemed poorly written anyway. The only time money was mentioned was when he was fully done and just said that I "have to pay" and when I sent the money he said "You should know better it's $15/page and there's 10 pages. $130 or I email your school" basically.

4. As advised by my therapist, I emailed my school and said a scammer got ahold of my personal email and sent a document he created (he did create, the edits show him making the doc, editing it, and adding me to it) and my gmail defaulted to the wrong email when confronting him as a scammer (it did, i'm kicking myself so hard for that I never want to use email again) and I have since removed myself from the doc. I stated to the school that I didn't recognize the assignment nor could I have submitted it because I have not submit anything to most of my classes in over a week due to very busy work schedule. I claimed it is a fake assignment (it seems like it is, despite copy and pasting my real prompt) and that I do not know who this person is.

I feel like it puts me in a weird position because it looks like I paid for a service ($20 sent via paypal) but he emailed my school account repeatedly asking for money with no reply from me before saying he would contact my school using the domain at the end of my email address at which point I became nervous.

And his first email was just "I can do your assignment" from a gmail address "Kevin Williams" and I genuinely assumed it was someone offering, because I have politely accepted homework offers from people online before that were not only completely free but passive income.

I am in the US at a community college but it's absolutely eating me up with paranoia.

His last emails before I blocked him were

"Hi buddy! I'm sorry but I think I have to send the email to your college so that I may know who is the professor in charge of the class of the assignment you gave me so that I can tell him/her to tell you to pay me. I will give you a window period of upto sunday and then I will send the email to your college since I have your school email."

Any input?

Stop dealing with the blackmailer. You have done everything right to prove that the paper is a fake and unsolicited. Even the previous emails sent back and forth prove you were not serious about the deal. Be upfront with your school and tell them you had no intention of hiring a writer and your submitted work proves that. Your mistake was sending him $20 but if you can prove the transfer was not for services rendered then you should be safe.

It appears that freelance writers are more likely to extort students than writing services. Is there a reason for this trend? Regardless, the advice remains consistent: don't give in to extortion attempts. Ignore threats and protect yourself.

It's obviously because (domestic) essay companies are at least identifiable to local authorties, whereas unqualified or scam writers, and those intending to perpetrate blackmail always absolutely refuse to disclose their real identities to their clients. That's why nobody should ever use any writer who insists on remaining anonymous. Legitimate writers have no reason to refuse to share their names and addresses with their clients, on request. Ideally, that information should also be capable of being verified independently by clients, such as through local directories and/or any cheap ID-verification service.

Blackmail is only possible behind the cloak of anonymity; so any writer who deliberately refuses to provide his info to prospective clients on their request should immediately be suspect. That doesn't mean writers actually need to publish their private information on their public websites for anybody and everybody (including scammers) to see; but they should always be willing to share it with prospective clients once they indicate that they are serious about ordering a project after preliminary discussion, such as about whether the writer can take the project with confidence and that the price range involved is within the budget of the client. Writers who refuse to do that obviously have something to hide and should never be trusted.