debit order dispute fustration

I am getting no joy from FNB, from the branch right through to the call center.

an unauthorized debit went through my account on the 01st of July 2020. I am unable to dispute it on the app as the amount is higher than R200. I go to the branch for assistance and Im told they cant help either have to do it via app via codiv19 real help. did that and a week later still no feedback or update on this matter. my account is sitting on zero now and that means for the rest of the month i cant get to work. getting help from a bank that their motto is "how can we help you?", yet we still can't get any of that help is beyond fustrating. you call senter keeps saying it is directing me for help then hangs up after. as for the secure chat i don't want to even say cause it seems everyone is clueless on that end.

the secure app chat says go to the branch, the branch says call the call center the call center hangs up. What must happen? put my money under my bed??????