Contact the post office via USPS.com.
When the carrier delivers the package they scan the bar code on the package, that scan also records the gps location of the delivery so the post office can find out exactly where they left it. They would still have to retrieve the package from whomever they delivered it to but at least you would know what happened and you would then have a better idea in which direction to proceed.
When the carrier delivers the package they scan the bar code on the package, that scan also records the gps location of the delivery so the post office can find out exactly where they left it. They would still have to retrieve the package from whomever they delivered it to but at least you would know what happened and you would then have a better idea in which direction to proceed.