Bad service and poor regulations.

Good day,i am very disappointed with the service I am receiving from cartrack I installed a tracking device from them last year, ever since the device was installed it always gives me problems sometimes the car doesn't start due to the device, they sent technician to check but could not see any problems, then another device was installed but after some few months the problem started again, I will be stuck for some hours until the device allows the car to start on 2 occasions I had to call a tow truck to tow the bakkie since I could not wait for the device to allow the car to start, during January 2023 the device could not detect where the car is since I olso check it with my mobile phone, they then said they will send a technician to come and install a new one, but I told them that I want them to remove the device from my bakkie and they told me to pay R2600 cancelation fee or wait until 2024 November when the contract will expire, or pay R600 for them to replace the device further more I was told that I can pay the R600 in installments of R30 per month which will be added to my monthly installment I agreed to that, end of January 2023 they started to deduct the R30 which they included on my monthly installment but no technician ever came to install a new device, today I encountered the very same problem when the car didn't want to start due to the device for almost 2 hours in that mean time I connected cartrack and they said they will send a technician, but no one came no one called me so the bakkie now frustrate me I even think of selling it just to get rid of the cartrack device and buy another bakkie and have another tracking company for my new bakkie please intervene.