Netstar blatantly *****ing money from my account.

I had a contract with netstart, once the 36month period ended they called me saying my contract is going over to a month to month and I need to upgrade my unit. In upgrading my unit I apparently signed into another 36month contract. This would be fine if the upgraded unit worked. Once the unit was upgraded I immediately had electrical issues. Charging problems and faulty wiring. Took my vehicle into suzuki, spent 7k with them and 2 months only to find out it was the trackers installation that damaged something. Once the tracker was removed the bike went back to working order. As soon as I got the bike back I started a dispute with netstar. A year later, a dozen emails, calls, messages and they are still debiting the full amount from my account. I've gone into the bank to stop and reverse but they change the reference number and debit me again. I have told them the unit is on a shelf in my garage and they can come collect it and cancel my contract but they continue to deduct. They then proceeded to deduct the entire contracts worth of debit orders from my account at once. This is unacceptable. They are acting like sars or something when their product and technicians are absolute ****. If you have a high end vehicle or motorcycle I advise against using this company for a tracking system as the problems you may experience with your vehicle afterwards is just not worth it. Find another service provider with qualified technicians.