Unhappy client

On the 13th of December 2022 I went to FNB Bank to fix my business account that had an outstanding amount and it's been handed over to the lawyers. Got to the bank and called the lawyers, they said if I pay the outstanding amount I will receive a settlement letter within 24hours after I have sent the proof of payment. I paid and sent them the proof of payment as soon as I done the payment, now I receive an email frm FNB lawyers still saying the same thing that I have outstanding amount. My account needs to be activated but the lawyers now are not sending the correct documents. I sent them an email again telling them that I have settled the account and no response.