False advertising on website

Went on the KFC South Africa website to see the menu. all opened and first pop up show the Crunch Double Down as buy one and get one free on pick up only not on delivery so i went to buy my Crunch Double Down. Got the the store and no one there even knows of the special. I showed them the special on the website but still the refuse to help me with my order. for this reason only I am making some trouble for KFC as they are making false advertising on there website. According to me a KFC is a KFC does't matter where you go all KFC's cant all have different specials as they all fall under KFC and if so i recommend they specify where the specials are and where not.