Update: I came home Wednesday and Heather let me know that they found the shipment. I said "Where is it", she said "it was on our doorstep" It was delivered here. It was not "returned", just delivered. Sigh.
Yesterday after work Heather took it down to the main Post Office here and handed it to the shift supervisor with an explanation of the destination and the issues.
It is now on the way again.... "with expedite" stickers...