Bad Service!!

Cartrack's service is **********, my car was hijacked in November after I took their services up in July .. I called when I got a notification from them saying there was a technical issue with the car. Firstly, the lady I spoke to did not attend my query as matter of urgency even though she confirmed that she could see that there was a notification to say there was something wrong with car. They did not help me find the car. I was assisted by the SAPS because their device was taken out by the train tracks and that was the last location that I could see on their App and this lady still wanted to ask me a lot of question even after passing security, I would have assumed she information of the car's location on her own system. Fastforward, I got the car back they never did any follow up with me to know what is happening with the car and when I got the car back, I called them for almost 2 months to come and reinstall the device and I kept calling them using my own airtime meanwhile they were still taking payment from me while I was not using their services. I called and advised that I wanted to cancel their contract because, what was I paying for!? I spoke to a lot of different advisors, even tried to reach to them on Facebook with no success. I'm tired of this company calling me, I sent them an email with all the times I called them and the screenshots of how long I stayed on call, where I was either being passed around from 1 department to the next or get to silent line where you can hear advisor's having a fat chat on the background. Now they have passed over to Attorney's, whom I told the same thing and asked, "Why does Cartrack want payments from me, what services are rendering to me, because they don't have a device in car?"