Mitsubishi tv and shop nbc Ripped off customer Irvine, California

I purchased a tv through shop NBC December 2010,a 65" Mitsubishi tv.After 5 month I had the tv not come on anymore.I called the number on the owners Manuel for troubleshooting, they said I would have to contact a service man which they gave me the name and number. I contacted the service rep which responded with in a couple of days.The reported to me it was a board in the tv. The ordered the part which came in a few days later,and of course this did not fix my problem. They took my tv to there shop to put in on some machine,after a few days I called the repair shop and they asked me if I had bought a used tv because it looked like it had worked on prior. They also told me they were not getting any help from Mitsubishi on trouble shooting the set. I again called customer service to see if I could get help, I was told that they had service tech on the phone with the service people. I called the service people after about 15 min, I was told they were put on hold and hung up after 20 min. The next day I called service people back and was told my part was back ordered for 6 weeks. I again called the 1-800 number for Mitsubishi and after a heated conversation about a 6week delivery I was hung up on by a customer rep. After a couple of weeks my wife called Mitsubishi again and was told that by next week if the part was not delivered that they would possibly replace my tv. After the week I called them and they assured me that the part was at the repair shop.I called the service man the next day and was told only one of two parts were received . I called Mitsubishi and was told they did'nt know there was multiple parts ordered and that they ship the second part today. I asked them to ship the part fedex so it arrived the next day. They said they could not do that . 5 weeks without and still waiting for answers