FNB Homeloan Bond Repayment Refund

Hi there I had property I had bought through FNB 6 years ago and decided to sell it last year, the registration was finalized in October, so as from November it was no longer on my name, FNB still deducted the bond repayment in November 2022 and it’s reflecting on my salary advice, I called them sent them the salary advice and they told me to wait for 40 days, I waited again in Jan I called to find out when will I be refunded they told me it bounced back they don’t have it on their side. My pay master couldn’t account because FNB deducted the money, they’re giving me the run for my money, they don’t want to refund me.