Worst Customer Experience from FNB Card Division

I hired a car and there was a deposit hold on my credit card. Upon the return of the car, the rental company released the deposit. It's almost a month now and the transaction still shows as pending on my credit card. I chatted with Thusego on 05 March 2025 who advised me to call FNB's authorization department (the number he gave me was for Capitec, that's an issue for another day). I called authorizations and they confirmed that the transaction was released/processed on 13 February 2025 and was transferred to the credit card division. There was an issue with the system as I could not be authenticated. I went back to the chat option where I was assisted by Seipati, who advised that there was no reversal of funds. So, authorizations was lying to me, that is what I surmised. I was, again, transferred to someone in the credit card division, Rookshana. No help again, I was asked to go back to authorizations. I am being charged interest on this amount due to FNB's inefficiencies. This is not the first time this is happening. A part of me thinks they are doing it to charge more interest on my card, which is very *********. The issue is still not resolved, I am being sent from one department to another. I do not have time for such nonsense.