FNB items paid

I have been Debited on items paid. My account was in errors for 1 day and I paid it the next day but I got debited R585. This is not what I signed up for and if this is how FNB does business then I will Gladly Switch Banks , please refund My R585 . I have Phone the call center and the lady couldn’t answer me when I asked questions, all she did was put me on hold for another 30 mins. I spoke to a guy named Jason on the FNB app and all he did was send me my detailed statement and ended the chat. There is no support from FNB. I need my money back or else like I said I will gladly switch banks because this is *******, and a huge let down and frustration towards a banks I’ve been with for over 7 years