I pay for Tracker systems mess

My vehicle with a Tracker was in an accident and totaled on the 9th of August. Within the following week I called tracker to cancel the service. I was told that due to the fact that it was installed by the vehicle manufacturer they would call me for the cancellation. This never happened and I resubmitted the cancel order in September where they tried to tell me the same thing and I had to fight to get it cancelled anyway. on the 25th of September I received confirmation that it was now cancelled. I was billed again for tracker on the 1st of October and they say it's due to a 30 day cancellation policy despite the fact that I tried cancelling this from the beginning of August. Never going close to them again