I must pay 570 to fix their system

The unit started beeping yesterday, I thought it was the car itself so I took it to the dealer who assured me its not the car but the tracker. Before I went to the dealer I first called cartrack to make sure the unit was working, which I was told it was. After I went to the dealer I called cartrack to arrange to have the unit fixed. I was told it would be done today due to the constant beeping. I called them now again to find out what is going on and as to be expected nobody knows anything! I was then told to take the car to an auto electrician to have the car checked??!!!! I told them its the tracker not the car, I was then told I must pay 570 to get the unit repaired!! Its not even a year old and now I must pay to have their faulty equipment replaced. This is not the first time I have had issues with cartrack, the service is pathetic!!!! I must now drive around with a car that is constantly beeping and this lot arent interested in sorting it out, really bad attitude and service!!!