Pay and clear transaction not reflecting in the recipients account for over 3 days

I am being treated unfairly by FNB

I made an instant payment of R15000 on 25 Nov 2024 at 3H42. This was a payment from my FNB account to MY Standard Bank account. It has now been 3 working days and the payment is still not reflecting. The issue can’t be that the payee bank account details are incorrect as I am always paying into this account and it’s on my beneficiaries list.

I called Standard Bank and they confirmed that there is nothing wrong with my account, no blockages and things like that. I am able to receive payments into this account.

I have been calling and texting FNB on a daily basis to check on what could be the problem and each time I am being told that the payment is successful.

I am really in desperate need of these funds and can’t wait so long for FNB to conclude their investigations. FNB has no sense of urgency and at this point it feels like they don’t care at all.

How possible is it that R15000 can just vanish into thin air? No explanation of whatsoever from FNB. I am being expected to just accept that the payment went through “successfully”?