Lies about drink flavor, and gibe unfriendly attitude 😒

The people 2 gives is food at driver way- they dont want to work. When I ordered food at the cashier at drive way. As a client I will choose a meal and for specific drink and ask the cashier if there is a specific drink in the shop and will say yes, when we get to receiving food point, the workers will lie and say the drink you request is not available, when you tell her, it's available because I checked first before with cashier before I pay, the lady will tell you only fanta and coke available while I request stone. Then ahe will gives you a very unfriendly face. Why should she lies, why gives unfriendly face? They are doing this attitude to me 3 times.