Complain

Tracker(Skytrax) installed the device on my car 2 years ago and i believe that the device was faulty because the device was not working 2 months after it was installed. Technician was sent to fix it. The device stopped working again and another Technician came to check it out. The device stopped working again then i complain asking the to change the device since it has been giving me problems month after month but they refused saying that it will work fine after the third time Technician fixed it. Now the device is not working and i have been calling the for the past 2 weeks and they keep on saying that they will call be back. They want me to pay for a Technician to check the device that has never worked properly. I call them everyday and they do not call me back as promised