CarTrack in state of accusation

I (SJ Swanepoel) sold a vehicle end of Nov 2019 into which a device of CarTrack was installed. They made an appointment with me to meet a CarTrack technician at a Ford dealer in Pretoria to remove the device from the sold vehicle and to reinstall it to another vehicle of mine. Their technician never pitched up. I was living in Kathu in the Northern Cape at that stage, which made it impossible for me to travel up and down between Kathu and Pretoria. After several phone calls, till to date the issue was never resolved. Since then the monthly debit order is still active. I thus paying for something I don't have. I also paid R600 end of December 2019 for the removal and reinstallment of the device, which never took place!! Should the vehicle been ****** without the tracking device, will they stand in for the loss? Definetly not, thus what am I paying for? How is it possible that companies get away with such *******ion? Actually it is theft. I even don't know whether the device was removed from my old vehicle since the day of our initial appointment. I am wondering if they will know either? Where is the device right now? I am not interested in a device from CarTrack anymore. I just want the existing contract to be cancelled, at no further cost. SJ Swanepoel.