im korean i nees help for purchase

Most of the people on these forums, including myself, are fellow users - you're not talking to iTunes Support here.

You can contact iTunes Support via this link and ask them for help (we won't know wht it's appearing) : http://www.apple.com/support/itunes/contact/ - click on Contact iTunes Store Support on the right-hand side of the page, then Purchases, Billing & Redemption