Worst tracker service

The worst ever car tracking system. Got the device installed in 2018 and to be honest that thing was faulty from the get go and never was there any service from tracker whatsoever nor any sense of urgency when my battery was taken of the car. I sold the vehicle with their device and tried to cancel their service only to be told that I will continue paying for the rediculous thing until 36 months has lapsed. My question was why would I continue paying for a useless device that I am not even using. I even offered to take the device back to them but the lady I spoke to was so rude and kept screaming in my ear. What useless company this is. And yes I've complained before even wrote a review before but guess what,.... A month down the line and not even a call nor email from them. Maybe since they value my money more than Smithton them asking my bank to reverse their debit orders would get someone to call me and explain to me how they continue charging me when I was upfront and letting them know that I sold the car and offering to return their useless device which honestly never worked. I've been at the most notorious and high risk places and left my car for hours in those areas and not even a single call to find out if everything is alright. I wonder what clown owns and runs cartrack honestly.