you have to make sure you have ordered the right 衣服, right size, right color (check your order history, and make sure everything is correct), then if they really made the mistake , you can email them firt, tell them they have made a mistake, and wait for their reponse.) normally, they won`t charge you shipping fee (maybe they will give you a free shipping for your next purchase)!! if you need help, just let me know !!
you use your credit card to purchased your clothes, right?! i believe they will credit back to your credit card. (shipping fee) or, didn`t you just say, "朋友幫我打電話到美國" maybe she or he can call them for you again!!