FNB ********* change of mind 5 months later

I received a response from a review I posted on here at the end of January 2023 where a Joan Askham communicated that FNB will refund me R9000 based on a **** where I did not receive any support from FNB. The ref number of this communicated was ***NF and the decision was made on 4 February 2023. I accepted this decision and considered the matter closed. Yesterday I received another communication from a different department (B McCarthy related to this problem) where some other findings were made and FNB actually took the money back this morning which I find utterly unproffessional. How can a company as big as FNB with a reputation they want to maintain go back on an official communication 5 months later? This is not right, unprofessional and actually *********! Please attend to this matter. I am getting no response from the care division. You seemed so helpful last time just to have FNB ***** the money back 5 months later?