Paid up Letter

I have experienced a worst experience with FNB. All l need is a paid up letter on my overdraft that was turned Into a personal loan. I have paid up the balance and all I have been asking for, for the past 2 weeks is a paid up letter to send to debt international and no one seems to be capable to help, I have been sent from pillar to post and that is my frustration. Mind you I'm spending airtime holding for more than and hour only to be transferred to someone who tells you they need to transfer you again ... So frustrating, l need my paid up letter please FNB.