Bad customer service for cancelling

I have been requesting a Cancellation from this company for many months and not been helped, rather slapped with a bill with no further assistance. When I raise questions, I get no response. I have been with them for many years and not once ever used the services I paid for. If I knew this is the way they conducted business and the way they ignored and not responded when you want to cancel, I would have never taken the tracking device with them.i am getting billed every month for something I want cancelled!!! I would not recommend them ever.