ABSA transfer your money without permission

ABSA is such a bad bank. Transferring money out of your account to another without your permission. And it is impossible to get hold of anyone at ABSA able to assist you. They transferred R6006 from my savings account to my credit card and now I have debit orders that did not go through. Now I even get charged with unpaid fees. I gave no permission to do this, not even on the phone. I did pay my credit card as agreed. How is it possible that a bank can have access to your accounts and transfer money as they please. I am going to switch all my business to another bank. My home loan, close accounts, everything!