Appalling service - Nedbank Bank Personal Loans

I had a personal loan with Nedbank which I have recently paid in full and it has been a complete nightmare trying to close the account now that I don't owe on it anymore. I was asked to pay a settlement amount which I did on the 24th of April and to date the account has not been closed as per my request although Nedbank has a 3 working day turnaround. I'm actually appalled by the service I've received and think this is just another way of making customer's lives difficult when they no longer need a service.