Terrible Customer Service

I am very disappointed in the service i received from your Canal Walk kiosk branch. I purchased biltong and wanted to add the special of R100 beef pieces and receive R50 droewors. The lady working there said, sorry we close we cannot provide you with the deal. You busy serving me but you cannot provide me with the deal??? Just because she was being lazy as she was packing the biltong up as i am standing there waiting for service. I have never experienced such terrible customer service before. I am disappointed.