Problems with cartrack

Low rating. The sales manager seems to be helpfull, but nothing is happening. My wife bought a silver Mahindra XUV700 and cartrack was installed as partof the deal. She sold the car to BB Nissan Silverton, and bought a Mahindra XU3. Again catrack was installed as part of the deal. BB Nissan Silverton never cancelled cartrack for the XUV700, for whuch my wife is still paying for. Cartrack indicated that the dealership wad supposed to cancel cartrack, whereas the dealership indicated that it was her responsability. Noone ever informed her about this. Neither cartrack or the dealership want to assist.