FNB has still NOT resolved my issue, how long will it take to get my money back

FNB doubled a transaction with my supplier done on 23/09/2022 on my Credit Card for an amount of R44878.75. This amount went off my Credit Card on 26/09/2022 twice. My supplier(M*** Limited) has logged a call (REF ***) with FNB on the 27/09/2022, I have also received an SMS from Standard Bank (Standard Bank: Due to a processing error at an agent bank, card purchases made between 19 and 24 September may be duplicated on your account. We are working with the agent bank to reverse the transactions. Funds will be credited to your account. We apologise for the inconvenience.) advising me of the error. This amount has still not been reversed to me since then and being month-end my payments are not going through and also this has messed my funds around and my debits on my Current account are also failing. How do I claim back the failed transaction fees as from FNB. I have contacted FNB via there online reporting and still no reply. I have tried calling FNB a number of times today *** and keeps getting cut off after waiting over 20 minutes.