Paying for services not rendered

To whom it may concern In December 2020 I bought a new vehicle and had to pay almost R1000 on top of my monthly premium just so Cartrack can remove the device from my old vehicle and put it into my new vehicle. It has since been more than a month and the device has not been installed, not even a date has been confirmed for installation in my new vehicle. I'm not happy with the service as I tried phoning a number of times and the number either went to voicemail or there was said 'we will call you back'. In the previous years I had the tracker no one has phoned me in events where my vehicle's battery was disconnected as per contract agreement, but at 23:00 in the evening they phone me to tell me the battery has been disconnected more than a month after I informed them of the old vehicle being sold.