Easy fix. Call your PO, open a case, and they will track the package down for you. It happened to me as a seller about a month ago. They will be able to see that they sent it to the wrong address.
Tradelist - http://www.blowoutcards.com/forums/football-singles-buy-sell-trade/683263-freemans-low-mid-high-end-trading-scan-heavy.html#post6882334
I can only ship on Mondays/Saturdays