Post Office locations in Tucson, AZ

I was waiting to be helped very patiently and because it was taking so long I walked over and started looking at the cards right in front of the counter. Meanwhile a customer came in and got in line behind someone else and was facing the counter in front of them the counter in front of me was finally done and she said I can help the next person in line and I said I was the next person in line and she called the woman that came in way after me and the woman told her that I was here first and the worker said I have to help the person in line. I was in line, she egnolished that I was there earlier but I was looking at the cards right in front of her. I told her that that was messed up and I left the priority box,tape, and card there on the counter and walked out. I will never use in this post office again. Mailbox etc would be better. I am very disappointed. Not only was I having to go else where I wasted 15 minutes of my lunch.
Sincerely,
Nancy