Bad Service

i bought a new vehicle and contacted cartrack to remove the tracking device from the old car and install it into the new car, a week went by and did not get any feedback from them. the old car was traded in and i informed cartrack that the car is at the dealer and gave them all the details, they asured me thay will contact the manager and make arrangements to deinstall the device, another week passed and there was no action, the vehicle got sold so i contacted cartrack for advise, a young lady assisted me and advised me that she will escalate the issue and have somebody come out ASAP to install a new device in my new vehicle, she also confirmed that i will not pay the R870 for the deinstallation because it was not my fault that it was not done on time, after a week again i was recieving numorous calls saying that i owe cartrack R870, i explained the same thing a number of times to the agents and they all said they will escalate the issue to be resolved however nothing happened and they also captured incorrect notes on the system to say that i refuse to pay the R870. i have been calling cartrack endless times to resolve the issue but nobody can help me, instead they just debited my account for the R870. everytime i call cartrack they just put me through to another person until i get tired and drop the call, i have not been assisted to date.