Cannot watch any channels properly

I have been experiencing issues with my Top TV since I changed over to the new HD decoder. I am unable to watch all the channels and if i get to watch a channel, it freezes with a message saying \ no signal"or \""not subscribed\"" even if I am subscribed to that channel. Contacted a technician that has been paid R500 for realignment of the dish and a new LNB but the problem still exists. nothing has changed. He is now advising that I need a new decoder but I cannot buy another decoder if this is a brand new one. <br> The technical guy does not want to come for further repairs. <br> <br> I am considering moving to DSTV as TopTV does not give the service they say."""