Forced and treated unfairly, and all Vodacom does is make me pay a penalty, not been my fault

This is as usual I'm always complaining about the customer service it's very unprofessional. I called on the 28 Aug 23 and spoke to a gentleman at 8.05am and asked for my banking details to be changed, but I asked that it must only be changed to go off the end of September as this month the end of August is to go off the old bank account and the gentleman stated it will still go off the old bank account. It's the 04th Sept and the monies still have not been taken off as discussed with the gentleman on the 28th Aug 23 at 08.05am. Vodacom can go and hear the conversation 28.08.23 at 0805am, and under no circumstances am I going to pay that extra penalty if that amount does not go off the old bank account as previous month's, as I stated and the staff member stated it will. I am very angry as it's stated as a customer I must pay this penalty which I will not, I will reverse and pay according to the statement emailed monthly and Vodacom has no right to make me pay a penalty on a staff member stating that it will be paid as discussed telephonically as I stated I won't give the new bank account details if it's going to cause problems which your staff member stated it will not. Rectify this and make it get sorted and paid as I stated to your staff member on the 28.08.23 at 08.05am, as I am not been put into a situation that I must pay extra, which is not at all fair or right for myself to be treated or forced to do this at any measures.