what should i do?

[evilpinkbear.livejournal.com]

this isn't craft related, but it relates to someone i decided to trade with through craftgrrl, and i'm hoping all the craftgrrls (and boys) can help me out.
i arranged to trade with a livejournal user a sundress and a book for something else. but then she asked for money instead. i was a bit hesitant, but agreed to in the end. i sent a money order and everything, but she never sent me anything back. i emailed her asking why, and she said she was moving into a new dorm, and she'd send it out the next friday, so i said fine. friday came and went and no word of the package. i emailed her again asking when she'd send it, and she never responded.
i posted in her livejournal, but she didn't respond to that either.
i don't know what to do, because i don't apreciate someone taking money from me like that and not even having the curtesy to lie about what hapened, and say it got lost in the mail. *rolls eyes*
does anyone have any ideas?

it's things like that, that make me never want to do mail trades again.