Cancellation Ignored

I have had a tracking device on my vehicle since September 2014. I then got into a car accident at the end of June and my vehicle was declared a write off. I then notified Cartrack in July of this BUT they still have not cancelled my account. I get 3-4 debits every month for a tracking device that is no longer needed. This is extremely frustrating and very costly. I will never recommend this company to anyone. They are robbing me blind and inconveniencing my finances.