I closed my account but its still open

Good day,

I have close my Standard bank check account on the 31st of August 2017. The lady who helped me at Loch Logan Waterfront - Bloemfontein to close my account said that they already billed me for the following month and I first need to pay the outstanding fee. She asked me to sign a form so that she can close the account for me. She also said that she will phone me the next day to tell me what the exactly amount will be that I need to pay. Since today 28/09/2017 no one has phoned me YET! I have send a complaint on Standard Bank's website middle Sept but also... No response on that either.

I received a couple of billing sms's for this month again. I will NOT be held responsible for Standard Bank's negligence.

I need you to close my account from your side.

Thank you