Same *^&%, Different Day

I have a dispute with Multichoice every year regarding the billing for my holiday home. I have now emailed them TWICE at *** and as yet they have not had the COURTESY to respond. They introduced self help on mydstv app which is frankly USELESS as if i need to activate one of my three decoders in the Cape, their app does not show the three in order to make a selection. You cannot just swipe past the first to get to the one you want. It used to work, but as usual, DSTV try and fix something that is not broken. So when they bill me, they bill me for too many premium subscriptions as the one is supposed to be extra view. And the app cannot give you current billing. I am currently in credit to the tune of more than R4,000 but their accounts don't reflect that at all. It is insulting enough that we have a subscription that costs five times more than Netflix and offers less than 20% of the viewing.