Unhappy with your service

I am very unhappy with an amount that was taken off on my account on the 03 Feb 2023, now my account is on minus. I spent almost an hour to understand why the amount was taken off on my account, I was put from pillar to post. The last lady that explained as why the money was off, she really sounded irritable when I wanted to know the explanation. A reversible was requested in Dec and its not Feb the charge only happen now, I would have appreciated if I was told in time that I must expect that an amount will be deducted, yes I understand that amount was on the form, but for FNB to just decided to deduct that amount unexpectedly and when I asked if its possible to reverse that transaction and when I have money on my account then they can deduct that amount...I was boldly told "UNFORTUNATELY IT CANNOT BE REVERSED, my worry is that my account is now sitting on minus and should any deposits happen on my account it will automatically go off, its the beginning of a month, and I cant deposit any amount on my account to fend myself for the month. I"M so unhappy with FNB at this point. The slogan how can we help you it really does not apply, because when I said to the lady can this be reversed and she boldly told me unfortunately...