Disappointed

Worst experience I've ever had, never been this undermine by someone who's a cashier. I wanted to buy coffee and airtime, so I asked the cashier if they use polyester cups or paper cups she said polyester. When I saw the polyester cups I asked her where are the paper cups she showed me the polyester cups. Then I told her this is not a paper cups and she said I must stop making coffee because I'm picky. I never rep**** I was fuming. I went out as I was waiting for the Uber but I was thirsty, so I went in and bought a cool drink. When I went in I found her screaming to the person in the kitchen and I told her to tone it down and she started making jokes about me with rest of the staff.