Unwilling to repair faulty tracking system

My wife Dr C van Zyl tried on Tuesday to activate her tracking system but it was unresponsive. She then pressed the panic button and they called within 5 min. she then complained about the lack of activation response from the unit and they promised to reset the unit. It did not work however. On Wednesday she called again reporting it and they said they will reset the unit again. This process was repeated 3 times yesterday and late yesterday they promised to phone her back to get the unit fixed. Today again we phoned and they informed that the original installer must attend to the problem but they did not want to treat us as an emergency and can only do so on Saturday. This is unacceptable since the vehicle is a high performance one it has a very high risk of being ****** forcing my wife to rather use my vehicle installed with a Matrix system with very good service leaving me without transport because I am to scared to use the vehicle without a tracking device. Who is now liable if the vehicle is ****** for sure Altech Netstar for their lack of customer service. They also refuse to cancel the service although we receive no service at the moment.