Pathetic!!!

I cancelled my Tracker but yet my account is still being debited. I cancelled with Tracker because the tracking device has not been working for who knows how long. I contacted Tracker two months ago to change my debit order date and at the same time questioned if my tracker gets tested regularly, which ofcourse the call centre could not answer that question as a result tracker did a rest and found that the tracker is not working. Why am I paying for something that is not working?? I want a refund for all the months I have paid for something that was not working!!!! Since I had the tracker not once did I get a call from Tracker to test the unit etc. Id rather go back to Netstar. I want confirmation that the policy was cancelled and that I will receive a refund for all the months I paid for and the tracker was not working.