I paid for something i didn't get

We decided to stop at Kuilsriver KFC to get lunch. We stood in a long que in the drive through and still waited on our order. We ordered 2x Double Crunch burger meals and 2x streetwise two. When we arrived home we saw we have single burgers and immediately called the store on *** but it was unreachable. We then called *** and spoke to Sibusiso from Customer service and he said that he was unable to help me and I must visit the nearest store with my slip. He told me to Google my nearest store and go with the slip. I am now forced to have complaint via Hello Peter as I will have to drive out to this branch and correct this error. This will cost me more petrol to go and it is 33 degrees. I have not had any lunch as I lost my appetite. I have the slip and photos of the burgers.