Discovery service is non existant

I called Discovery call centre on a long distance call from New Zealand to South Africa, and I was on that call for almost half an hour that cost me several hundred rand. The call centre person went and spoke to a senior adviser which is why I had to hold so long on the call, and I was quoted R1280 odd for my father's medical aid…WITH the penalty amount (the penalty was going be an extra R30-R50). Now I know that verbal is binding, so I’m going to ask again, to go and trace that recorded call and find the senior advisor that quoted me that amount and give me the paperwork with the amount I was quoted with as, quite frankly, I’m getting sick and tired now of going backwards and forwards with emails. If I do not get what was promised to me, I’m going to take this to social media as I’ve now been waiting over a MONTH to finalise this application for my father and it’s getting out of control.