Settlement - Bad Service

In January 2025 i requested a settlement letter for my fnb account. Nimble send me the settlement with R200 discount only. i paid the settlement amount and noticed fnb did not update my records & closed the account. i called nimble numerous times since jan regarding this and all i ever hear is we will sort it out please send proof of payment which i did twice already. now im sending follow up to Shaney and im getting ignored and fnb is charging more interest on the R200 which i will prob be liable for. if i knew this would have happened i would have paid the account in full.