Very bad service

I have been complaining about a problem that I have with the tracking device since last year. They say the scheduling department will call me and they never did on multiple times. When I complained last year again they said scheduling department will call again, but when they called the phone rings not even 1 second and it's a missed call. Then they say they were trying to contact you. Then they send me an sms saying that they are canceling the repair as the device is working fine but not on the app.

The device worked again for about a week and it stopped again. Now the app is showing my car has been parked for today 69 days and I use the vehicle everyday.

This people don't want to help with the situation because they keep on escalating the problem everything i call and nothing is happening