Good luck finding something on the holiday! Did they actually ship it wrong, or did the post office deliver it wrong? If it's close by, you could probably contact the post office and get it sorted faster.
That sucks. Happened to me once, but it was the delivery guys fault. It was a set of harddrives for my PC that I needed ASAP and they delivered to a house a couple blocks away. I called UPS and the guy got the package and redelivered it to me. And this was on xmas eve too IIRC, so I feel your pain. I was just lucky.