A quick update... As I wrote in in my original post, I reopened my case
with USPS and escalated with Consumer Affairs. Today, they I received
the following email from them:
Hi, just sharing my experience in attempt to track down a package in
USPS ISC New York. I purchased a musical instrument from Turkey through
eBay on Nov 25, 2020. The seller promptly shipped the item (or at least
created the tracking label) on the sa...
