Terrible service!and your product is unreliable!

I have had a tracker retrieve installed in my new car. It has been 3 years and I have had to change my car battery twice. I had my car checked and there no faults were found. I was then told, that it could be a possibility that the tracking unit is draining the battery power. So I decided to do a self test, which was unsuccesful. I was then told to do an OTA test- and I would only get the results after 3 days. 3 days has passed and I have not received an email ( as they said they would send) confirmin the results of the test. So I call them again... only to be told that the test was unsuccesful as they could not pick up a signal from my car. Then I said I needed to know when the device stopped working as I have being paying monthly for something that is not working. I was then told that sometimes it fails due to low frequency and in order to do a proper check they would send a technician to me at a cost of R395.I then told them which service centre I wanted to take my car to, and no one bothered to confirm a booking with me. I have been paying for something that doesnt work,umerous calls to your unhelpful call centre, I still have to pay for some1 to check the device. RIDICULOUS