Query not resolved

I am absolutely appalled with the service I am receiving from FNB... I did a EFT to my Campus for my Registration fees and the Campus debited me as well. I am battling to get the debit order reversed. I spoke to the campus, they told me to speak to my bank. I have called the FNB call centre, after all the options when you finally get to the debit order department, an automated voice mail states we should use our app or cellphone banking for debit order reversals. The app doesn't allow for reversals over R200 and cellphone banking debit order options states "This service is currently unavailable due to maintenance" ... I then went to the Chatsworth branch as I was in that area, there was an absolutely rude Indian Lady as the manager at the front of the door... She was not helpful and said she cannot help me.... I come from the customer service industry and that for service was my worst experience. I have been with FNB for years, I never had these issues before... Today I still didn't have my query resolved and had no one who could help me in an appropriate manner