Cartrack very Bad service

I'm disgust by the service of Cartrack..I call Cartrack to remove my tracking device from the one car that I trade in and put it on the new one that was 29 May 2023, I literally phone them over 20 times different departments even spoke to a Team Leader last Friday 9June 2023 and was promised it will be sorted by the pass Monday, Milton of their scheduling department phone me yesterday and today told me I must be available to the are going to put the tracker in the new car still and yet again I was ghosted, I drop all my plans also today. The worst of all their accounts department phone and email me to pay the R870 for no work done, and the best part of all they will deduct their monthly fee and of this month for no service. I really hope someone will read this and assist/help me to end my contact with them without paying the remainder of months left,this is my worst customer experience.