Bad communication with costumers, not getting helped to get a tracking device fixed

I’ve been a paying customer for 3.5 years now. I have issues with my tracker device not positioning correctly on my app. I’ve reach out the first time on 14 December to schedule an appointment with a technician. It was first calling back and forth for more than 4 times over a period of 5 days to confirm the issue and to make sure they have to schedule a technician to come out. Finally got an appointment 23 December- no one showed up or even called to reschedule. Called the 24th to find out what the problem is and reschedule. Got it rescheduled for the 24th. No one showed up the whole day- finally called them at 16:20 the afternoon. Just to find out they are having issues with getting stock to come out. Over this period of 10 days I’ve been told more than 4 times they are “escalating” the situation or “they’ve send an email” but no resolving the issue or even communicating with their costumers are being made. I am being kept on a line now for too long and I’ve expressed many times that I am crossing borders on the 27th. And if something happens to my car they will just say it is the costumers responsibility to make sure they unit is working. This is unacceptable, and after all of this back an forth and my device not working I am still expected to pay my monthly fee. If this issue is not resolved by the 26th I will take my business somewhere else. Would not suggest using their services