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I was able to obtain the actual delivery address from the delivery company (which turned out to be 5 blocks away from the intended delivery location).
Got the number for the Mailroom person, and a confirmation that they do have our package (could not give it to us because it was after hours). I decided that we will wait for redelivery and if nothing happens today, then we will just grab the package from the wrong address.
But the package got finally delivered today, 2 days after the intended overnight delivery day.
Quest completed.