Contact the United States Postal Service by phone

I need to contact the China Post Office using a local phone number in the United States, Tel:+852 3468 5355/+852 3468 5351. At the same time, I will provide the tracking number of the package and directly complain as the recipient that the package was not received, but the information shows delivery. I need to provide a solution to suspect encountering fraud (similar to Amazon after-sales complaints)