Impossible to get tracker installed.

I am an existing customer, and have been trying to get a tracker installed in my new car since December. I purchased a car in East London, and arranged to have the tracker installed on the 17th. I made it clear it was a time sensitive matter, and that it had to be on or before the 17th because I was travelling straight from East London to Hogsback. I was assured it would happen. When I picked the car up, the tracker had not been installed, and the installer said they had got the dates confused and could only do it the next day. On returning to JHB, I contacted Matrix for installation. I was contacted the same day - by an installer in George, Western Cape. I again contacted Matrix - and have not heard back since. My insurance is dependant on the installation of this tracker, and the service has been non-existant. In the interim, I am still being billed - for a service I am not receiving.