Capitec de*****ed me R4500 and they don't want to reverse it

There was a deduction of R4500 on my account via debit order which I did not authorized and I don't even know that Company. I went to the Branch in Parrow to reverse it and stop it but the two ladies that were assisting me informed me that cannot be done as I accepted it via debi check I have tried to explained to the that I don't remember accepting that all I want is my money back and I will be closing this **** of a bank after that the service is terrible bad and the staff is useless and clueless all they know is to commit ***** and take your money.... Please stay away from Capitec for your own sanity