Rushed to order for no reason

Hi.

Today at 17:15 we drove to KFC to order supper. While in the drivethrough, we were trying to select what to eat from the menu. The lady asked if we wanted to order and we said not yet, just give us a minute. After 10s she shouted again what do you want to order. Yet again I said give me a minute (no one at all behind us) She said "dont take time" I lost my temper and drove off. I will never buy anything from any KFC again!!!!