Horrible service

I booked an appointment to have the device removed from my old car and installed in my new car , confirmed the booking 4 times and now the agent is at the dealership refusing to install the device in my new car and says he is only there to remove it ! The service I received from the agents have been very unprofessional, everytime I get through to the call centre an agent answers and then cuts my call , I then have to hold for 30 -40 minutes before I can get through to another agent to do the exact same thing , I really am disgusted by the service I am considering getting out of this contract!