Poor customer service

On a few occasions l have gone to purchase at said shop but each time l go there the cashiers are very unhelpful and speak to me, as well as other customers l have approached, in a belligerent manner. If the cashiers are having a bad day, they tend to take their frustrations out on the customers.Being a shop that serves the people, l feel that they need to change their attitude when dealing with customers. I will never go back to this shop again.