Cannot get my money back on an overcharge

On the 30th January 2021, someone saying they were from Vodacom phoned me to offer a new contract.

I emphatically said that they must not change anything as there are so many ****s going around and that I would rather go into a store to change my contract details.

Low and behold, Vodacom changed my contract and deducted R2,605.54 from my bank account.

This I followed up on the 26th February 2021 and was told that they will reverse the change in contract and credit my account.

Well no money back in my bank account.

They don't give you your money back!!! They just credit your Vodacom account with the over charge.

What a novel way of reaping in cash flow?

Overcharge your clients, don't give them their money back but credit their account you have with them!!!