Pathetic service from Cresta Branch: Standard Bank

My husband tried to close an account that he is not using. Went to Cresta Branch. They said they cannot read his signature clearly from their records on file. He has banked with them for more than 35 years. He was standing in front of the service (non) advisor with ID book and Proof of residence and they can't verify a signature! . We have not been able to close the account.