KFC Butterworth Bell Street

I had the worst KFC experience today. I bought a Vodapay exclusive special for collection at Butterworth Bell Street. I sent my sister to collect, who travelled from our in Centane spending R33*2 = R66. When she got there the manager said it is an error but she will assist my sister as it was not our error, but later on said he won't assist as this was a system error. Other people got their orders in some stores, and that's what makes me angry the most. I shouldn't be unconvinced by an error that wasn't made by me. According to Consumer Protection Act, the service provider is obligated to fulfill the purchase offer they made to the customer if the purchase was done based on the offer they made. The manager and the lady cared less about me, even after i suggested that they ask their support centre how they can better handle this incident. Im very disappointed and feel disrespected.