Deducting money without permission

A marketer from Vodacom rewards called me in end November. She explained to me that vodacom was moving all their existing clients to a new type of contract and they are contacting everyone who is still on the older type of contract.

She confirmed what I was paying monthly and what airtime I was getting. Which was +- R450 with R230 airtime. She stated that she wants to move me over to this contract at no extra cost.

I asked REPEATEDLY if I will need to pay extra or if the amount I will need to pay will stay the same. She confirmed a few times that I will NOT be paying extra and will actually be "scoring" airime for a few months while still paying my original amount.

On the 3rd of December, to my surprise, I saw on my Vodacom app that my bill is over R600!!!!! I called Vodacom immediately and asked what the hell was going on as that is NOT what the lady said on the phone. The lady said they will look into it and call me back in 1-2 weeks. That would've been before Christmas that they should have called. Ref for the call Rco16052.

I still have not received a call back and over R600 was deducted from my account. This is ****** unacceptable. If someone doesn't call me back within this week and refund me the difference and change my account back to what it was, I'm going to go to my bank and reverse this transaction.