False advertising

I am not exactly sure whom to direct this to, so I am directing it to Coca-Cola SA, KFC and Engen.<br> <br> I was in Engen Centurion Park on 23 November to purchase a refreshment. I had initially not picked up a Coca-Cola product, however I spotted the promotion that offers a R20 KFC voucher when purchasing 2 x 500ml Coca-Cola products. I promptly picked up 2x 500ml Cokes instead. I was very excited to treat myself to a bit of KFC this morning, proceeded to get my voucher code and walked into KFC Epsom Downs. Imagine my disappointment when I was told that my KFC WiCode 'won't work\. None of the 3 lethargic employees in the front of the restaurant could tell me why. <br> <br> This is false advertising and frankly not acceptable. I would not have chosen to purchase a Coca-Cola product on that day or walked into a KFC today otherwise."