USPS and International shipments was not fun to deal with when I had a package go MIA but repeated calls eventually got me to someone who could actually do something. Not saying that is the route you should take but stranger things have happened like all of a sudden it starts updating after making inquires where the heck my vape mail is!
I heard that signing up for text/e-mail alerts sometimes gets the package moving in the USPS system, but I chalk the successful stories up to coincidence. If the package doesn't arrive by next Thursday (a week from today's scheduled delivery), I'll start making calls. If worst comes to worst, I can always get my money refunded. However, I'd rather have the product that I ordered. I'm hoping that it's just weather delays.