Un-authorised debit order

On the 10th of March 2021 I received an SMS that stated that I need to accept a Debi check Mandate for C Wealth, this message was sent by Capitec. I called them immediately to let them know that someone is trying to deduct **********ly on my account but their response did not satisfy me, they told me that they can't stop it and also said I must wait for it to deduct then reverse it later. I couldn't accept that and further explained that I use capitec to save only so I don't send companies to deduct anything on my capitec account and told them that I have no clue of that company but the the debit order went through. Capitec did not protect my account and I did not accept any Debi check Mandate but somehow it was approved and when I called to check who accepted it, I was not given an answer. Please help me get protection I need from capitec.