I had same thing happen 3x last year with the USPS. I called my the local Post Master and she paid me.
The carriers would deliver to the wrong mailbox and the people would not return the item which I don't get.
One item was a BBM bronze tipped fuel pump pushrod ordered from Summit. I waited a year for it. What are the chances that someone had a BBM roller cam engine that needed it. Of course USPS would not tell me who they delivered to.