Shocking service

I went to pay my account yesterday at the Northgate Telkom. I got there and Nelly was assisting someone. I then waited for her to finish, as she finished I got up so I could get assistance. Then a lady walked in and Nelly was quick to jump to help her while I was just waiting there, the lady then even asked her if she could help me first as I was in front but nelly insisted in helping this lady before me. The body language, facial expression and the tone was not that welcoming. I then didnt cause a scene about it, I just left it. Paid my bill and left. Whats disturbing is its like she was ****ed off she was working on a Sunday and I wasnt.