Channel Not working

I recently experienced a case where i cannot receive a channel on my DSTV anymore. <br> This channel is the only channel in my bouquet that i am not able to view as a result of some signal related message that does not go away no mater what steps i follow. (Ch 172)<br> This just started about 2 weeks ago and has not resolved itself. I have made calls to the call center and all they do is give me the same troubleshooting steps that do not work.