One thing I found that can help is one's own local post office. I had a shipment cycling through three USPS distribution centers for weeks. I tried the National USPS lack of Help Line with zero results. I called my small town local postmaster who went into their system and did some action online that put a hold on it and something that required a manual physical search and intervention. Situation was resolved in two days.
When I mentioned this to another small town USPS postmaster she said she had never heard of or been trained in what to do in a case like that. So sounds like I got lucky as well.
When I mentioned this to another small town USPS postmaster she said she had never heard of or been trained in what to do in a case like that. So sounds like I got lucky as well.