Pathetic service

Fnb refuses to close my account. From 27th of December I’ve been requesting for my account to be closed, I paid the fee they was outstanding on the day and was told it would take 5 business days to be closed. I followed up on the 6th day, it wasn’t closed. I’ve been calling every other day after that, it’s either I’m placed on hold till the line cuts or there’s just no straight answer. One told me there’s other fees incurred after the day which I will not pay cause it’s not my fault the account is still open. It’s pathetic really