Appalling service from cartrack

I've been struggling to get car track to fix a account problem since May 2025. Vehicle was involved in an accident and written off. I replaced the vehicle in June 2024 but they started charging me for 2 cars. They only canceled the other car a week ago when I asked to cancel their service. A new problem has now started, the app doesn't show the location of my vehicle and when I contact them, I'm being told that the unit is faulty and that I need to pay for a technician to come check the fault. It's amazing how all of a sudden the device becomes faulty after they finally canceled the car that was in an accident. This no way to treat a customer that pays for a service.