I recently stopped working for this company and now they are refusing to pay me. I have proof of the money that is owed but they won't pay

I was working in east Tn and I moved to middle Tn to work for this same company, while I was moving my former boss got into an altercation with my brother in law that worked for him also. I was 7 hours away and had no knowledge of anything happening until they called and asked me to fedex my iPad back. (Used for trip logs) when I asked why they stated what had happened and said they were worried about me? After words I just told them I quit. I sent back all the company belongings and now they refuse to pay me. I also found on a paysheet where they allowed the secretary to make a trip in my name. She picked up a patient at a healthcare facility and used my identity. I had no knowledge of this until I saw my paysheet. They owe me over 3000.00 just in pay, I want to sue but nobody will help me. They will not respond or tell me who their attny is to contact. What should I do ?