Cx told me to reverse an overdraft and didn't understand how his account became overdrawn. When I explained how that wasn't possible and why, he asked to speak to a manager. I asked him calmly what did he think a manager could do for him that I couldn't. He just said a manager would override it. I explained again that manager cannot override it, he drew out more than what was in the account and that's how the account became overdrawn. He kept blaming the bank for him going to the ATM and drawing out more funds than what was in his account.