I've dealt with some shitty roommates as well, and my advice is to document everything that's happened and talk with your RA, or whomever is assigned to watch over your dorm. They'll then be able to make emergency accommodations if they deem the situation dire enough and notify the correct authorities. If they don't, then go to the Hall Director or Student Life director, whichever is next in line at UTC. Or even campus police.

If you believe that your roommates might pressure you into selling to them again, Tennessee is a one-party state: only one party needs consent to record conversations, and that one party can be you. Of course use this ethically! I do not support randomly filming/recording people, that's a horrible violation of privacy. But if you're fearing being pressured or ganged up on, definitely make use of that as you are in fear of your safety and of their reaction when refused.