
Personally, I don't see how you can separate poor quality from a scam.
I believe that if a paper turned in is of poor quality, then the student got scammed by the company he hired or the writer he directly contracted for the job.
When a writer is hired for the job, the client expects that person to be highly knowledgeable about the topic indicated.
He is also expected to have impeccable writing skills which will allow the student to use the model paper without having to do any of the extra work that you mentioned.
Anytime a client has to go an extra mile to fix the paper that was paid for, a scam, in my opinion, occurred.
I don't understand why you had to hire an extra editor when you could have just sent the essay back to the company for revisions or reassignment / revised writing work.
That is part of the service.
That is, unless you knew you were paying for shabby service in the first place and just wanted to get your work completed on the cheap side.