These store is too small to accommodate more drinks for just a special

I was at KFC Fourways mall, I was attended by the cashier by the name of Rudzani, I went there to buy go six special and she said they not selling the special currently, I asked why as I jsut saw an add online about the special, she said they not selling as they don't have 1litre coke, so because I really wanted KFC I was willing to take it without the drink, however she was so rude she told me about their store being small and can't accommodate more drinks and I really want the drink I should go to fourways crossing, I'm very disappointed with service I ended up eating something else for supper as she had ruined my plans, her approach was disappointing as the face of the store at the time, it was actually my second time being disappointed there and I don't think I will ever set my foot there