All I'm saying is if the vendor says you have to wait it's because they can't even start a claims process this soon and would lose a lot of money sending out duplicate shipments every time USooPS screws up. I know it's aggravating, but at this point in time it's USPS that's screwed you over, not the vendor who shipped it. You just may have to wait a week and see what happens first.
When a vendor screws up and puts the wrong info on a package... or prints their labels using the stupid "ink saving" mode.. or puts the label on so crappy that a light breeze pulls it off.. yep its the USPS's fault.

I've worked for the USPS for almost 21 years, the vast majority of the package screwups are labeling errors. For 3 years I was also a supervisor and was one of the guys tracking down packages that people claimed we "lost". If only it were legal for me to post pictures of the BS i've seen... and blamed on us.
I had a package the other day, 2 numbers of the address were left.. tracking number wasn't even there, the barcode was.. but part of it was gone. You could read the last name and last half of the first name.
Tell me it will reach the destination on time... The ONLY reason we even bothered to try and figure out where it was supposed to go, the return address was also ripped off. Was from NY somewhere..
Shipper taped the label on the package.. but not very good, tape got caught on something during processing and ripped the label to Hell.
Check the IBTanked forum, a package was "lost" in there as well.. guess what? it went
through processing equipment it shouldn't have and got stuck on the belt and destroyed the label. (Wasn't shippers fault, that was ours)
well.. If we can't figure out either of the addresses, technically we can't open the package.. we have to send the package to a center in Atlanta where *they* can open the package if needed to figure out where to send it. In the case I mentioned it looks like thats exactly what happened, and it was returned to IBTanked. All this takes time, so people think it's "lost" when it really isn't.
I'm only speaking of the USPS, but trust me UPS and FedEx have the same problem. And ever since people have able to print their own postage/labels at home (for all 3) it's gotten worse. When you bring your screwed up labels to a retail counter (USPS/UPS/FedEx) they make sure everything is ok before they accept it.. but with people doing it at home and dropping it off somewhere, or picked up in bulk with no retail person to look it over.. people get away with half-assed packing/labeling and packages get "lost" or delayed. People just think they can do whatever they want and not follow the rules, and when something goes wrong.. blame someone else.
Edit: also, if it's a package from overseas.. Customs can hold it for a very long time. The scan will show that *we* have it.. but in reality Customs has it, they could be holding it for any number of reasons but it looks like we are the problem. The scans that you the customer sees.. are minimal, internally we see more details.