Pathetic service matrix

I have my beamie installed for many years. I have not used the service once. So I would assume they could manage my account correctly. When we changed our vehicle over a year ago, I sent an email and called them to update for the new vehicle and cancel our old vehicle. They still continued to charge us for a vehicle not in our possession. I then cancelled my other car late last year because I sold the vehicle. Sent them an email and again in Feb this year. Still paying for 2 vehicles when I have one linked with beamie. Someone did call from call centre said I need to go through cancellations, put me on hold and never took the call again.