A few months ago, I hired a company located in the UK to help me with some assignments. The price was reasonable, but the quality of the work was not good, thats why I wanted to refund my money.

The thing is, I (idiotically) never deleted the name of my school from the papers I sent them, so they know where I study.

They did not refund my money, even by threatening that I have to give more money, and still they are threatening that they will directly send it to my school. School is not UK-based but in the EU.

They are really scams, and they have recently created two email domains and are sending me threats that they will directly report to my school and that they will tell my school about my academic dishonesty.

The most important thing is that I did not use any of the words. In this case, what can be the consequence?

Basically, I'm being blackmailed and extorted, and for days and days now, I've been thinking about all the negative consequences this may result in.

Has anyone ever been in a situation like this? Do you have any ideas of what I could do?