Xbox Update.....I May Be Screwed

My 360 died.  I called Xbox and they said it would be $99 to fix it.  I agree and give them my card information.  I get off the phone and realize I had bought an extended warranty from Walmart.  I dig out the receipt and call Walmart.  They tell me they will send me a shipping label.  I call Xbox back and cancel my order.  No problem they say.  I check my bank account and two days later, they recredit my account.  The next day I come home and there is a coffin on the front steps.  I box up the 360 and the next day it is on it's way to Texas.  Life is good........ until last night.  I get home and there is a letter from Pennsylvania that looks official.  I open it up and it is a shipping label from Walmart to send my 360 back to Pennsylvania.  Uh oh.  Xbox cancelled everything except the coffin order.  My 360 went to the wrong place.  Not sure what to do.  I am not sure if Xbox will even have a record of who's 360 it is suppose to belong to.  It may be sitting in Texas in a lost and found box.  For some reason, I have a feeling that this isn't going to end well.