NEDBANK INEPTNESS AND UNABLE TO SERVICE CUSTOMERS

I am most disappointed with Nedbank service. I have a personal loan account and want to settle. I have called 4 times for the banking details and they promise to email it or send an SMS. Its a day later and 5 calls that cut later. The settlement letter has a deadline and if I miss the deadline will they still accept the settlement as its due to their ineptness that I am not able to settle. I want to settle this account and never have to deal with them again