ITC Report due to Standard Banks negligence

We left South Africa in 2008 to move overseas closing all our Standard Bank Accounts and related credit cards etc. But due to the incompetence of the bank we found out via relatives that this had not been done and Standard Bank were still allowing direct debits to be debited from an account which we had closed (this is now 2014). Meanwhile whilst we were on holiday here in 2014 we visited Standard Bank to once again close the accounts and credit cards. We have emails whereby we were in direct contact with one of the consultants whom promised that all accounts would be closed. We are now back in South Africa and I had an ITC check done on myself and found that Standard Bank stated that I owed R1750 on a credit card account which I have not used since 2008. So the account was not closed in 2014 either and I have been charged a service fee. I have contacted Standard twice now and they ensured that they would email me a letter stating that this account was closed in 2014 and that I owe them nothing. Well I have still not received anything, I was given no reference number when they logged my complaint and I am still waiting for the letter, after spending 3 hours on my cellphone waiting to get put through to the correct department and finally talk to someone, whom promised that this would be sorted out within 5 working days. 10 working days onward and the matter is still not received. I feel I have not choice but to take this to the ombudsman and also show them proof of my emails stating that the accounts should be closed. One very frustrated ex customer