bank fees vs closing of account - Nedbank?

Closing an account is such a hassling process. I have been trying to close an account at Nedbank for weeks now. Eventually I thought I managed to get the account closed through an agent who confirmed the closure of the account while it was in a negative balance of R5 , to my surprise 2 weeks later - the account is not closed and now i am not sure what to do because it means even if i call AGAIN this will not be actioned. Could this be a way of Nedbank trying to get money through bank fees - because if the account is not closed and i am not using it, i will still be liable for the excessive fees which was the reason why i decided to close the account in the first place? Since when is closing an account such a hassle