Bad delivery from Cartrack

I have been with car track for almost a year and i am not Happy at all! The first time they sent a technician to fit in the tracker,he was struggling with the network..he said he will be back the following day...he came back and apparently it was fine...only to find out a few weeks later that's its not working...another technician was sent 2 fix this..it worked only for a few weeks and it stopped again,this i only got to find out because i was having a problem with my car battery and was surprised that car track never called as soon as i removed the battery. When calling them to ask, i was told that its not working.. this morning another technician was sent again to fix it,now we cannot start the car and still car track cannot trace my car! First of all i have been paying each and every month for something that's not working, why is it that when their system stops working they unable to detect that..this is bad service at its best! I'm sitting here waiting for a callback from car track to send the technician back AGAIN!! While i am unable to start my car.