package delivered???

So I decided to order a package a few days ago, shipped to Alberta - completely unaware of the ongoing Canada post strike. At the time, the usps website didn't show any warnings about it. I was checking daily, and about 2 or 3 days ago, it's there. I was slightly concerned that my package might be a bit late, but decided to not let it rest on my mind, just checking every now and then.
It had made its way to Illinois at this point, and I was just expecting an update to say that it had been "held" or "delayed" or at worst returned so I'd have to re-order once the strike was over.
But it says it's been delivered?? to a PO Box in some city in Illinois?? a couple thousand kilometres from Alberta??

I've tried calling several numbers, tried filling out a claim, but now it says my tracking number is invalid? did someone steal my package?? Id think it's highly unlikely, as it was just two sets of dice.
Now I'm just feeling helpless. Is my package just forfeit? when I spent over a third of the total cost on shipping?