Canby Post Office 97013

I went inside to ask questions and the clerk at the register was very condescending. I was trying to understand the protocol for delivered items that had not actually been delivered. She just kept repeating the same thing over and over in very snippy tone. I kept saying I understood that, but I wanted to know how it worked if package didn't come. State employees have the worst reputation for being rude. I suggest a training on how to address the public.