Refused service

Dear Nick
This morning while I was lining for another fly because the cancellation of JQ 507 . A lady at the front service refused to service me . Complain that I was blocking another customer and should stand aside . I probably did answer back . She said I refused to service you . Now can Someone be refuse to service while try to change another fly with no fault of themselves .
I am sad and anger .
This lady name is call Charmaine . I have also noticed after she service a few students , one left passport behind she was making face to her colleagues instead of rush out to this student . I need an answer
Thank you
Dr bernadette Bong
11 Kitchener st
Nedlands 6009