Faulty uniy

I had a tracker unit installed in my new vehicle a month ago.<br> <br> Since then I get regular messages from tracker that my main car battery has been disconnected - which is obviously not the case.<br> <br> Today alone I have received TWO such notifications.<br> <br> A technician from tracker came and checked the unit two days ago, inconvenienced me for two hours and apparently found nothing wrong.<br> <br> The unit is obviously faulty and tracker is not interested in rectifying the matter. Why am I wasting my money on a nonfunctional unit?<br> <br>