Standard Bank at their best

I had a standard bank cheque account, savings, credit card and account for my child. Due to the lack of service delivery I moved all my accounts to another bank. I was then left with the credit card to pay off. Once it was paid off standard bank did not inform me that the account has been closed nor did they communicate it with a letter. My credit score still reflects as though I have an outstanding Standard bank account which is false because I closed the account in August 2019. Can Standard bank for once deliver the appropriate service, by closing my account and sending me the confirmation, as they would have communicated it I was still owing them . Nothing sunrises me about their poor approach, however it is really bad for my credit score