Poor service

CarTrack agents are selling tracking devices under false pretense. Was sold a cartrack device by one of their agents at a mall and was told that it was a month to month contract for R99 only to be told that the contract is for 36 months. I have sold the vehicle but Cartrack still wants me to pay for the tracking device as they say the contract is for 36 months. I have requested that they forward me the contract on numerious times but they have not. They have substiquently handed my account to Nimble collections agent without even forwarding me a copy of the contract that they promised and Nimble collections has forwarded adverse information to credit beureus without even contacting me. My ID number is *** contact number ***