I am traveling in Japan and bought an APP STORE CARD inorder to charge my ID, but when I doing this in itunes, system refused my requirement and told me that I cannot use this card since I am a CHINESE USER. when i buying this card, I asked the shop assistant whether I can using it in China, and they said that is OK.
Right now I am wondering what should I do now? Let is useless plastic card returned or just seating here and letting my money gone since I am a "CHINESE USER"?
The shop assistant gave you the wrong information. Store vouchers can only be applied to the store for the region they are issued in. Content providers only want you to buy from your local/home store. You can either try going back to the store for a refund or give the card away to someone who can use it.