Unable to watch dstv now

I have been experiencing a problem with dstv now, the other day I spoke to a consultant on messanger and never returned back to me. The problem I have is I'd watch a channel or catch up a show, change to another one but when I'm supposed to watch the 3rd channel, the dstv app becomes blank and doesn't load that show or channel. Each time I have to watch I must Uninstall the app and install it again but same problem will occur. I can't keep u installing and installing to watch my channels or catch up. At first I thought that was a problem with my TV but I checked using other app for eg Netflix or shoemax they don't give me that problem. I'm so irritated right now I want something sorted asap. Someone must call me and have this fixed if not you'll loose a client.