DQtrack - they don't arrive & then faulty system

Previous to this - DQtrack didn't bother to arrive at appointments, nor cancel telephonically. Anton Ossip was to call personally. Now since the DQtrack unit has finally been installed - i get a call every 2 days to ask if i am okay as Discovery have received an emergency/accident message. I have asked the call centre person to make a note and phone me back with a solution. I have not had a return call with a solution. The unit is clearly faulty. I mailed Vinesan Philips and informed him of the issue. i have had no reply. I have requested a new unit and not a unit to be repaired. i have also asked for the manager of DQtrack to personally supervise the installer. Seeing that they really messed up before the unit was installed i think they can make certain this time. I have had no communication on this. Anton Ossip was to call previously as confirmed by his pa as i managed to get his office line - apparently.