Oh, Emily, what a pain. I am having a similar issue with Gear Link -- they sent my new stem to the wrong address, and it was their fault, not mine, because my receipt shows that it was entered correctly. All they will do is refund the shipping, which is not acceptable seeing that I never got the stem. I am going to have to go through my credit card because now customer service won't even respond to my e-mails.
I am also worried that I need to cancel my credit card, because they won't respond to my query as to whether they put the card number on any of the package enclosures. Someone at a different address could have both my stem AND my credit card number. Not cool.