Since it was shipped from overseas, how do you know whatever service that initially handled it didn't hand it off to the USPS in that condition and they simply delivered what they received ?
Just curios as I really couldn't tell what happened from what you posted other than it appears the shipper sent something properly packaged and you received a total mess ? How do you know where it happened and who had possession of it when it got wrecked ? I'm guessing it would go through customs before it leaves the country it was sent from and then to US customs and then finally to the USPS or is that totally wrong ? Not saying the USPS didn't do this, just curios how you decided it was them and not one of the zillion other organizations that probably handled your package before it got to you.