Bad Service

At the end of August I advised car track customer service by mail that my car was trade to a reputable car dealer and that my tracking device needs to be switch off also new arrangement must be made to install tracker in my new vehicle. I have been paying a bill since then with no new arrangement. Also got an sms in Dec 2017 to advise my tracker is in working order while I'm under the impression it was disconnected. Car track agent verbally confirmed that it will be switch off at that time. Sent an email last week still waiting on a response. Fed up