Cartrack - Keep *****ing Money out my account Services I never received

Got my tracker installed a few months ago. All went well. Then i needed it removed and installed in my new vehicle. Needless to say its about a month later with no success, and Cartrack just keeps debiting my account for services they havent provided for nearly a month now. They keep deducting the de and re installation fee but the unit is still in my old car. I contacted them and said if my unit isnt installed and reinstalled in the next few days they must cancel my contract and stop any deductions as they are in breach of contract because they cant provide me for the service ive been paying for.

Needless to say once again, ive not heard anything from them, they tried deducting off my account twice already for the de and re installation and my emails also go unanswered.