Absolutely useless, want me to pay more because of their incompetence.

I asked my Prestige Banker, Nyameka, on Monday if I could close my revolving loan account. She phoned me on Tuesday to give me the settlement balance, which I paid. I emailed her asking to close the account, she said she would phone me yesterday, as she needed to wait for the funds to clear. Well, she did not phone me. I emailed her again today, and she gave me a number to call to close the account. Now I am told that the settlement balance was only valid for 2 days and now I have to PAY MORE money in to close it! How ridiculous! Why must I be penalised for this banker not doing her job? I want my loan account closed urgently, without having to pay more money into the account!