Cancellation Issues

I had a Tracker fitted into my ehicle at the vehicle dealership when i purchased my vehicle in 2013. I was not advised that this is a 3 year contract at that point in time. In March 2015 i sold that vehicle and purchased a new vehicle. When i called to cancel the tracker i was then advised that i cannot cancel as it is a 2 year contract and that i should cancel in June 2015. when i called back in June 2015 i was then told that it was a 3 year contract and not a 2 year contract. i then advised the consultant that i no longer have the vehicle that the tracker is fitter into and that it should be cancelled. In October i received an email with termination charges, but this was for my current vehicle that i have and not for the vehicle that i wanted to cancel, i then responded to the email and advised Tracker of the correct details. To date i have not received any feedback from Tracker and my account is still being debited. i called in again today and was advised that they would get a consultant to call me back. This is absolute madness because firstly i did not agree to a 3 year contract and now when im trying to cancel it, i am unable to do so.