Channels not working

I’ve been struggling with Multichoice for over 3 weeks now. Im on the Primium package and some of my channels shows a no signal mesaage. According to DSTV customer service they cant assist or help. I have to wait for the channel signals to come online again - they cant give a time indication either. Not sure how to solve this. I pay for the full package, but only get 75% of the channels...