Disgusting service

I have beentrying for a month to sort my account out. I was sent a quote which I never accepted. Suddenly I received an account for 2 phones. When I spoke to the call centre agent a month ago, was promised it would be sorted out in 2 to 3 business days. It still hasn't, and today I received an account for R1020, after having paid in full. I have been on a call for over an hour, still hanging on. They have given me 3 different amounts, asked to speak to a manager 3 times, they refuse to talk to me. The service is disgusting to say the least, I have been a loyal paying customer for many years, at least 20. Is this how they treat customers? They should be ashamed of themselves. I guarantee I will not get any satisfactory response. Thando, the agent has been helpful, but his hands are tied.