Cancelled Contract

I cancelled my contract when I got my new vehicle. A year later they are still billing me for this vehicle.<br> It unacceptable that I must go back over a year to find the person who assisted me,but it was done over the phone. I told them to go back to a specific date and pull the recorded phone conversation. I'm still waiting. But I recieved yet another billing I have had enough of companies taking advantage of their customers with no customer service.