Harassment and Threatening Messages

I paid Richfield College upfront for my year of studies. I did not complete my studies as the study material was not up to standard, during class some students took control of the live screen and had ***ual intercourse and there were over 400 students in 1 hour of class. No attention was paid to students. How are we supposed to pass? After almost a year I get a letter from Hartman Attorneys stating I owe Richfield and Hartman Attorneys money. I don't owe them anything. I keep getting harassment messages and still get it to this day that they are putting a trace alert on my ID. How is this fair? Richfield contacted them and I didn't owe Richfield any money as they charged me for a subject that's not even part of my degree. I will not pay them a cent and settle this matter in court if it is not removed from my name. I am done with people trying to milk innocent people for money.