CMG Payday Loans OSL SCAM*FRAUD* Atlanta, Georgia

I received a a phone call from a man from CMG check fraud division. This man called and left a voice mail (very detailed on my parents voice mail) who then in turn called me and told me that some one is looking for because there has been a check fraud claim againist me. My mother found it suspiscious and told me not to give them any personal information. They called me from two numbers both from atlanta ga 404 220 7611 and 678 325 1538. When I spoke to this man he claimed that I took out a payday loan back in 2008. I told him that I dont deal with payday loan and that this information must be inaccurate. ALso I asked why are you contacting me 3 years laters on this so called debt I owe.  I requested that he send me something in wrting showing that I owe this and the contract that I supposedly signed. He said that he could not do it but I owe $600 dolloars. He asked for my banking info, I refused to give it him. THat was july 2011, now three months later still no paperwork and now a phone call stated that my account is being referred for a court date in my county. I asked when this courtdate was he stated that they would get back to me. WHO ARE THESE people, they will not give me proof of this so called debt. I am in the process of gathering my paperwork together to meet them in court (if and when they send me a court date)and also contacting my states attorney. At this point I dont know what else to do.