bad customer service

We to buy hotwings from the fly thru,the worst customer service ever. The staff is just angry,unfriendly and don't give good service as though they are forced to work. The lady taking payments was just angry then the lady giving the food,no greeting and the way she gave us our wings she didn't look at us,no thank you because she was in a rush to go back to her conversation which seemed more important than customers. A sure way to get rid of customers.