hello - i may be able to shed some light for you based on my recent experience. I ordered an item (not qvc) that also showed it was delivered to me. However, after many attempts to reach the local post office (yep, rings and rings and then cuts you off), I finally got someone who tracked it for me. The GPS on the mail truck timed the driver delivering my package to a different street about 3 blocks away, with the same house number. It was scanned and delivered to them. Now, you would think the folks who live there would return it to their mailbox for re-delivery, but no. The postal agent had to knock on the door to actually physically retrieve the box. I eventually got my stuff.
Try a smaller post office branch rather than the main one. That's how I got an answer. They picked up right away. Good Luck to you 