I was told (by Canada Post) that my package "is heading back in m direction" because I took the following steps:
I shipped from the US.
Called USPS, who told me they could do nothing and to contact Canada Post.
Canada Post told me to file a claim with Canadian Anti-Fraud Department. I did.
Called back Canada Post the next day just for a general tracking update and to vent a bit.
I was told that because I filed a claim with Anti-Fraud Canada, Canada Post stopped shipment to the dipshit's address and is re-routing it back to me.
I did my best to stress to the people I was talking to that many other victims are involved. They seemed to be aware of the situation already. Some packages are still sitting in the Mtl distribution center and the Laval P.O..
Keep at it with USPS. The automated system is BS, but with some grinding you will find a human.