Unsure of my mail carrier was just on vacation, or if this was the start of my own personal Hell, I followed up yesterday; I got the phone number for my local Post Office; someone answered the phone. She said she would relay the message to my letter carrier, who it turns out, took two days off. I spoke to him personally and said I hoped he had a nice vacation.
The same person called my yesterday evening to follow-up. I told her I spoke to my letter carrier and she said she would talk to her supervisor about the temporary letter carrier, so that this doesn’t happen again!