Poor service

I requested a tracker removal and re-Fitment as I traded in my vehicle for a new one.<br> <br> I paid necessary costs, but I was then given a unit which is not functioning properly. Only one remote works. The unit i had in my previous car was not even 2 months old, so all parts were new.<br> It's been over a week and no one has rectified, even though I was promised someone was coming to fix any issues i had.<br> <br> The remotea i was given had scuff marks.