I wish there was a zero star option

I have been a customer with them for more than 7 years with multiple vehicles on their most expensive unit.A tracker is a requirement for my insurance.I bought a new vehicle in November and they installed a faulty unit which has never worked. Despite numerous calls and hours of holding they don’t bother to communicate nor attend to the repair or replacement of my unit.i have been unable to use my vehicle for weeks because i know i am not covered should anything happen to it.U am beyond frustrated and disappointed by the ********** service from them.