King Soopers

Today I went to King soopers, 2810 Quebec st, Denver Co, with my friend. One cashier help me twice for self check out and I felt sorry so I asked her u look tired. She said "u r mean". I asked why? I am not. she said "U yelled". No I didn't. Even I put face mask.
I talked to manager about this but manager Tracy told me cashier is always nice to customers and she hasn't issue before.
Cashier told me "U r mean" in front of people. I am very upset. I will watch how compony manage this happening.
This is my information. Plz let me know.
Lucy Hwang, 720.427.8009
[protected]@outlook.com