Despicable customer service

I sent a request on the 04th of August to cancel by tracking service on my car as I sold it. The only communication I received beside my invoice emails was a reference number on the 05th August. I called in mid August to ensure that my cancellation was received which I received acknowledgement on. However every month since then I have had to call in because they comfortably invoice me and debit my account and still after complaining I still don't receive a call or invoice to advise when it will be cancelled. I once again had to call in today, 01st December and was advised that the service was cancelled in November however there was not indication that a refunds for October and November was ever processed and this was submitted whilst I was on the phone. Again not estimated time as to how long that will take. Their customer service stinks and I will never recommend their service.