Worst service in my life

Should give 0 rating. My wife bought a car from Mahindra Silverton. Cartrack was installed as part of the deal. She sold the car to Mahindra Silverton and bought a new car from the dealershio. Again, cartrack was installed as part of the deal. Mahindra Silverton did not cancel the first deal with cartrack. My wife is trying now for more than two weeks to cancel the first deal, but cartrack customer service indicated that Mahindra must cancel it. She tried to work trhough Mahindra Silverton and was promised that it was cancelled. This has not been done and if you tryto call Cartrack, the phone isveither ringing forever, or you are put on hold and cut off after a few minutes. She is paying for a car that is not on her name anymore and Cartrack is not willing to assist.