Terrible service from installer..

Themba came in January to install extraview but 2 channels were not working. We have been calling to sort this out but the problem persist and now it's escalated to even the main tv/decoder not working totally. He never left his details not his accreditation number, so reporting him with multichoice is fruitless as even they cannot get ahold of him without this number. Called multichoice numerous times until finally was informed it's an installation issue, call Themba again he says he will be coming to fix it... well we are still waiting. I call again today after arranging for someone to be home waiting for him and we are still waiting. He doesn't answer our calls, his landline doesnt even exist and if he does he is on his way in the next hour. I don't understand why we are supporting black businesses and this is the service they give us other blacks..