Capitec allowed for money to be taken from my account without permission

In a quick summary, I had ads that ran from my account all of this was stopped however merchants kept taking money. I then went to the bank to get a new card for money not to be taken from my account. To my surprise, after I changed the card/account, I saw that money was taken from my account, when I queried this from my Capitec I was told that master card automatically updates the bank details, now one must be worried that even when you change your card the bank still allow for money to be taken even though you have not authorized this. When asked to speak to a manager I was told there is no one on the floor that can help. This to me is a serious concern as the bank needs to protect your information and not allow things like this to happen.