Settlement Letters Request

I have finally settled all my loans and other accounts with FNB on 1st Feb 2022. I have been requesting paid up letters since then. I phoned someone drom the debt department a few days ago, when she told me that one of the accounts that I have paid up was rejected from FNB side. How is that even possible.

I closed my cheque account in 2018, and since then, there has been a interest build up of over R13000, which is also now preventing me from moving forward.

I have received only two paid letters since the beginning of the month, and this delay means a major delay in my receiving my clearance certificate. Please help!!!!