Pathetic service ever, if I R2800 I would pay car tracker and leave them.

I called the car track to come to deactivate the tracker in my car as I was selling it and reactivate it on a new car, and I did not get assistance. When I called for the second time they said it's R2800 to cancel the subscription and to reactivate the new tracker on the new car it's R800. My old car is sold, and I have a new car without a tracker but the debit order went off despite my request, R224 was debited plus R600 however I'm still not assisted. The control department called me as they picked up a signal problem on the sold car that was no longer in my position, and they transferred me to customer service where I was put on hold for 20 minutes and still not assisted, I ended up dropping the call as I was at work. The worst service ever, I never expected tracker to treat me that way. I am still their customer it was just a matter of deactivating the old tracker and reactivating the new one, why so much money? What if I was no longer employed and could no longer afford to pay car tracker, and wanted to cancel the subscription, would I still be charged R2800 for deactivating it? Why do you treat your clients like this? What a pathetic service, customer service had a terrible attitude when I vented out about their pathetic service.