nedbank 's bad service from teller and manager

I was refused to withdraw money from my account by teller seun gininda because nedbank doesn't trust money deposited from their ATM. When asked to speak to the manager Chris makwanza I was told by seun gininda that he said that he is too busy. Nedbank went as far as calling the person who made the CASH deposit at the ATM in limpopo. It's strange why nedbank wants to verify cash deposit of R6700. I was refused withdrawal of R5000 inside the nedbank menlyn mall branch. As I was waiting for the manager who was too busy I overhead the tellers laughing and saying that it's probably ****** cash and that teller(seun gininda )should call the person who made the cash deposit to verify and the person who made the cash deposit was indeed called by nedbank. This has left me very humiliated by nedbank and it's staff after being their customer for so many years.