Poor service at Multiple choice

I have been receiving a bad service from multichoice since the 24th of Jan, am being told I have not paid my account,I have sent them the proof of payment that I pay every month before my actual payment date. I have been calling them ever since. They reconnect and promise to resolve the query, then disconnect me again after 3 or 4 days later. I'm holding on now for more than 30 minutes,this is not acceptable at all.