Overcharges from Vodacom

So I complained last month about the over charges on my vodacom account. i soon got a message from hellopeter that a vodacom consultant will soon be contacting me. I did get contacted and had to verify if the sim in my phone is the one registered with vodacom. i got a mail saying that it was and i must not loose my sim. Still no results from my complaints. I have been a loyal vodacom client for over 20 years ( on contract ) when this contract expires i will never have any dealings with Vodacom. I was told that a sim swop was done on my account and thats why I have the extra charges. If i did the sim swop then play me back the recording of the swop. Lets hear who is on the phone and what security questions are being asked and answered.