Refusal to cancel my contract

My car insurance came with a tracker installed and I had no idea I would have to keep paying even after cancelling the insurance, when tracker started calling me and I told them I quit my job and I wanted to cancel the contract with tracker since I will also sell my car, tracker consultants told me the contract cannot be cancelled and I would have to keep paying for a useless service for another 2 years and I stopped paying after a few months, and when they called me after 6 months or so I told them I wont pay for something I am not benefiting from and I asked them again if I can pay and cancel the contract and the answer was the same until their lawyers called me and I told them I wouldn't pay unless I can cancel the contract and that is when they told me to call tracker and tracker will assist me.<br> <br> I called tracker and they told me they were going to send me a form to cancel and also calculate the fee to cancel the contract even today 3 years later I am still unable to cancel useless thing from my name, I called your lawyers MCS and they gave me the amount to settle and I did, and confirmed if I was done, but now I find two installments from tracker for I don't even know what.