Account payment not processed and unhelpful staff

I have such a horrible experience with Edgars west street branch. On the 5th of August 2018 I went to pay my account at Edgars, I asked the store assistant to take R1000 on the one card and R165 on my other card. However the cashier by the name of Bonga Khumalo ( ********** ) processed the payment of R1000 and then told me that the computer froze and that he can not reprint the slip. He called the supervisor and she advised that the amount will reverse on its own. The cashier then processed the other payment of R165 and gave me a slip for that payment. Since August I have been receiving call asking me to pay on my account, I keep on explaining to them that I have paid and every time I am being told to go to the branch and sort it out. On my last encounter the cashier that assisted me when asked by the manager to explain what happened on the day he rep**** rudely by saying "If it is such a problem I will pay the money using my own cash" this was on the 10th of November 2018. I am very disappointed with Edgars as this has caused so many delays in my things, this account shows up even when I am trying to apply for car finance. This has been dragging since August .