Question about International shipping hub

Sent my first package through the hub to Germany. Buyer recieved a notice the next day that it had been delivered. Sent me a frantic message as they had NOT recieved it. I assured them it was still on the way and had just arrived at the shipping hub. They have been given no information from the shipping hub as to tracking to them, approximate dates of arrival or anyone to contact for info, and are asking me these questions. 

I've been trying to get some info from the ebay hub but no luck so far.  WHO is in charge of the hub and where do we get contact info for it???

(I'm not a new ebay seller, been selling since the days we had to be paid with a personal cheque sent through the mail!!) 

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I still see that questionable "Delivered to individual" note when the parcel is given to the eIS plant at Carol Stream.

There's another panic inducing bit of jargon.

They seem to mean "we handed it over to a human being who signed for it and did not leave it on the loading dock in the rain." 

But it sounds like they gave it to some rando in a small town no one has ever heard of.