I took my car to Cartrack in Port Elizabeth branch to install a tracker, After installing their device I Noticed that my radio is damaged and my kilometers are very high, I went back immediately to Inform them

I took my car to Cartrack in Port Elizabeth branch to install a tracker, After installing their device I Noticed that my radio is damaged and my kilometers are very high, I went back immediately to Inform them. They then booked my car again and the inspector informed me that they are going to remove the tracker and re install it so I left my car for another 3hours and when I came back to my surprise the problem was not fixed and my killos were still ridiculously high and my radio was stl not fixed. The inspector calmly told me to take the car to a dealer at my own cost to prove that they are the ones who caused the problem because they can't just pay even though I have a duplicate that shows my kilometers when they book my car for the 1st time they are refusing to pay for the damages they have caused to my car. The call center is not helping and they are refusing to send me my contract. Please help.