Unprofessional / Belittling Behavour

Bought a vest only realized when I got home the security tag was not removed from my vest . Took the vest back to the shop when I walked in the siren went on and I went to straight to the cashiers , there was only three of us in line and me proudly African was in the middle and then cashier assisted the first lady when she was still waiting for the payment machine kept giving me this look as if am irritating just kept quite waiting for my turn for assistance with the removal of the tag on my vest to my surprise the cashier skipped me and asked for the gentleman if he needs nay assistance and the gentleman told her but the lady is in front of me assist her first , and she turned with that same look and I asked why is she jumping me on the line with attitude told me it still very early in the morning for that was so ****ed off cause am also a paying customer the way she was looking at me was so unprofessional , jumping me on the line was also unprofessional