Bad policy and overcharging of customer

I went to incredible connection on the 21 of July. Had a very friendly staff member assisting me and then a glitch happened. Their system stalled. This is where things went pair shaped. The manager made me wait one and a half hour. End result was I paid R400 cash for product and 399 on card. The manager insisted that I repay the card amount again because their fault system would automatically refund the 399 because of their policy. I was promised by the manager Rochelle that she would follow up with me. It is now the 26th and still no refund and even worse no followup. I was now told she is on holiday and I have to wait for her return. So to recap because of their policies I am out of an extra R 399 on a product priced at R 799 but was sold for R 1198. So please with tears in my eyes i am asking people to really be careful of purchasing anything from Pavilion Incredible connection. No follow up by managers...even the regional manager would not speak to me.... go figure.