Disappointed with Standard Bank Service.

I used my U count card to purchase fuel. This transaction was duplicated due to systems error. I called in to the call centre and was told that it will take 7 days for the transaction to be reversed. After 7 days I call in again and spoke to Zayyan, this transaction was not reversed. He promised to have it reversed and will call me back. Two weeks later no call from Zayyan I called back and this time I spoke to a person by the name of Michel he said that I need to complete a form and have it signed by the merchant. After three weeks I was told to complete a form( Why was I not told that in the first place) I do not think the merchant will remember this transaction. I refused to complete the due to my principles. He put me through to the team leader by the name of Rowen Solomens. He promised to sort it out for me and get back to me. I did not hear from him again. I got a call from Zayyan and he promised to sort this out and call me back He did not call back and two days later I called again. Zayyan was not available so I spoke to Megan. By this time I was frustrated and said I want to speak to the director or manager in charge. Nobody calls back.