I can feel your frustration. It happens to me a lot more than it should. WHat really suck is that usually it ends up at the neighbor around the corner. My street is Salford and the one around the corner is Southport. I used to walk their mail when we got hers, Id ring the bell and hand it to her, never a thank you or smile..... but I did it because it was the right thing to do.
We have had notices that things were delivered , but not to us. I know she has gotten our mail but never give it back, nor even writes a note and puts it her mailbox to have it sent back.
We even have had mail delivered to someone across the main street and they have driven the package to me, which is so nice. I had an expensive and really hard to get MOD mis-delivered to that person across the street and was freaking out. I was in the middle of complaining on the phone when my son answered the door and that nice neighbor and handed it to him. I was so relieved.
Anyway, I hope it gets taken care of and that the company you ordered from doesnt hassle you and sends you a replacement. Its horrible because really, the company is not responsible if the USPS drops the ball, but most good companies do replace and then get it taken care of with USPS.