FNB double debit error that was not reversed

FNB erroneously double debit my cheque account after I ALREADY made payment to my credit card. According to the transactions on my accounts the double debit has been reversed from my credit card but still has NOT been received in my FNB cheque account. Following multiple interactions with FNB service consultants I'm either told that the reversal will take 24hrs to reflect even though the reversal was done between two FNB accounts. Or I'm told that I'm not due a reversal because the debits and credits cancel eachother. Fact remains, FNB took money that they weren't supposed to. Allegedly reversed it but I have not received the funds. The reversal was done on 1 March 2025, but on 5 March 2025 I still have not received the reversal. I've had MULTIPLE conversations and made numerous complaints on the matter but theres a lack of understanding and empathy from FNB regarding how this error impacts the client. This error prevented my home loan from being deducted and I had to make arrangements for an error which is not my fault but I must now be held accountable for missed payments due to an FNB error. Should feedback not be received I will report the matter to the ombudsman