No service! No assistance on their faulty device!

I'm basically paying Cartrack for a service they cannot deliver. It's been 2 months now that my car has been showing no signal on the tracking app and website. When I call them, they too cannot track the car as it's not traceable from their side. They've been promising to send one of their technicians to check the tracking device on my vehicle and sort it out, well guess what, 2 months and 6 complaints later and no technician assigned!! My account gets debited with no hassles, but a mere technician cannot be assigned to fix their faulty device! What will happen if my car gets ******???? I regret signing up with Cartrack if this is the service I'm getting. They are all *****, as they could not even give me any reference number for my complaints, just kept on saying we will get our technicians to contact you to arrange a callout! My car is a sitting duck at the moment, yet I'm paying Cartrack for tracking services!