I need a senior member to resolve this asap

I have installed a tracking device in October 2018 and the installer of Tracker knocked my vehicle. The staff member acknowledged the accident, as there was witnesses as well. this was circulated to the technicians superior, Antonio Meyer. Eight months later, the car was then taken in for repairs. Tracker refused to supply me with a courtesy vehicle. The car is currently at the panel beaters and payment was never made by Tracker, neither would they authorize my reverse sensors to be installed as R2750.00 for the set of sensors are too expensive to replace. This was damaged when the technician reversed my van into a concrete wall. Antonio Meyer of Tracker (Installations supervisor) is now ducking and diving and refuse to return my calls and mails. When calling tracker and requesting a person in a more senior position that i can liaise with, regarding this issue at hand, no one has a direct number. There is absolutely NO transparency.

I have been accommodating and explained to Antonio that i am defendant on my vehicle for my family and work.

I WOULD NOT RECOMMEND Tracker to anyone .