MWEB - Worse customer relations

I have a fixed LTE product with MWEB. Its uncapped. It stopped working saying I reached my limit despite me not using it for a whole month. I contacted MWEB, they said they will sort it out and its been 8 days and its not sorted out.Im stuck without internet. I can not call them as they ONLY use 087 numbers and Cell C doesn't dial 087 numbers. When I do lend a phone to call, I have to wait 30 minutes for MWEB to answer. How must I sort out my stuff like this? They7 don't respond to email or queries logged on their website ever.