Standard bank cannot give me written confirmation of account closure

I was at Standard Bank Menlyn branch on Saturday to close my current account. The person I dealt with confirmed that the account has been closed, however, when I log into Internet banking the account no. *** still shows open with a balance of R7. I phoned Standard Bank today to confirm if the account has in fact been closed and I requested written confirmation for that. I was told by the operator that they cannot provide a written/e-mailed notice. This is rediculous!! So how do I have proof that my account has in fact been closed and that there will be no future charges?