When USPS has marked a shipment Delivered and it has been past 48 hours, please contact your local post office to speak with a representative, as well as filing a claim either by phone or online with USPS:
USPS
Phone: (800) 275 - 8777
Online: https://www.usps.com/help/claims.htm
Our Information:
L USA Logistics
43422 West Oaks Drive #155
Novi, MI 48377