Nedbank is very bad but are the first to reprimand

I have a Business Account with Nedbank, recently there were two transactions that took close to R500 (I still want it back, won't give up!) of which I have no idea about. The bogus transactions occurred on the 30th March 2019. I called the department to help me on the 1st April 2019, they sent me some form to fill in and apparently escalated my matter and waited for a response. Yesterday (08 April 2019) , someone called me and said they will rather block the card and issue me a new one and stated that I wouldn't have to pay for this (when I wake up the following morning (09 April 2019) an amount of +-R55 has been debited!) How ridiculous, as if I am not going through the worst and you still have the audacity to debit me even though it is not my fault that bogus transactions happened in my account! I am not happy at all!