Chipotle Mexican Grill

I went to Chipotle for the first time on the 20th September in Denver and it was probably the last one. Overall the food was ok, but the service was extremely rude and unfriendly. Especially the cashier (young female cashier with dark skin tone and long hair). I'm from Germany and accidentally mispronounced guacamole (still had the German pronunciation in my head). The cashier began to laugh and requested a couple times in front of everybody, that I should repeat my pronunciation of guacamole. After I did that, she laughed even more and just made fun of me. Unfortunately not in a friendly way. Especially because it was in front of everybody. I felt really embarrassed and uncomfortable. That's not the way you should treat a customer. Like I said, that was probably my last time at Chipotle.