really bad service

I installed my openview hd decoder on tuesday but it kept on telling me no signal. My dish is exactly in the same direction as it was of the previous people that stayed here but nothing. I also did register the decoder. I phoned customer care on wednesday an they put met throught to the tech dept but I holded on for almost half an hour. When the guys answerd he told me they will phone me back for there is no one at their desks. I'm still waiting for someone to contact me or don't they want to cause maybe this is a bad product and just want to make money. I've put new connections on every where an even moved the dish but nothing. What must I do?????