Dischem staff has no customer etiquette

Dischem Blue Route has the worst customer service I have ever seen. Especially their cashiers, they don't greet, they don't say thank you, they don"t ackowledge you in any shapr or form. I was in the shop on Saturday 10 February. They called the next customer till 8 which was me, the till said card payments only. The cashier asked me if i'm paying bu card I said, no cash. She looked at me somewhat annoyed I might add, as if I was swearing or something at her. So why call the next customer of you don't want cash. I will gladly take my stuff for free