Faulty unit in my vehcile for weeks, Netstar has ZERO interest in repairting or resolving

AGAIN, PATHETIC service from Netstar. The unit installed in my Hilux is currently faulty, it sends faulty panics, doesnt show on the app when the ignition is on, and half the time the tracking on the app in inaccurate or takes hours to update. I have reported this issue two weeks back with a reference CAS-***-P9L3. NOTHING is being done to actually resolve or have the unit repaired. I emailed them numerous times, going so far to ask them if they dont want to reapair the unit which seems to be the case then cancel the contract, and remove the unit and we both go our seperate ways, so a slight bit of a response was they got a JHB installed to conact me, the only problem with that being is that I dont live in JHB, I live in Durban, I honestly thoght an account address or even tracking the vehicles daily wearabouts would make this an obvious one, but no promises that a local fitment agent would contact me shortly thereafter has gone completely silent. Netstar if you guys cant do something as simple as sort out my faulty unit, how are you going to actually recover a ****** vehicle, or are you just happy to keep debiting my account for the faulty unit installed in my vehicle