They do not want to reimburse me

My vehicle's ventilator and heater button stopped working and heater/air-conditioner was not operational. My 1st thought was to take the car to the dealership on the 13th of April so that they can fix whatever the issue was because the vehicle is still under warranty. The dealership's findings was that this issue was caused by the tracking device that was fitted to my vehicle, blocking the ventilators and I had to pay the dealership an amount of R798.00 for the diagnostics. I called Tracker and advised them of this and they told me they would send a \Senior Technician"to find out if the issue was indeed caused by the tracker and then give me feedback in 3 days. A Technician was sent out and no feedback was given and I have had to call their call center three times now and am running from pillar to post. I called today and their agent advised me that I shouldn't have taken the car to the dealership so they can't reimburse me"