You won't get support for EU/US account here in China. You should call to Oceanic office, in New Zealand, or Australia.
Also even making a call is not needed. Go to sea.battle.net, sign in with your account. Go to support page. And fill support ticket. Also put your IP there or even better, your IP range, because I think almost everyone in China have dynamic IPs.
P.S.
After you do that. Buy US WoW and play together with me. I can tun you to lvl70 in no time. I'm on Oceanic server Khaz'Goroth.

I'm currently lvl71 Unholy DPS DK. But I stopped playing, decided take a break until Cataclysm come out. But if you'll sign up for WoW, I can return to game. Also if you will make new account, let me provide you with friend invite link. You'll get 10 free days, and if you will upgrade to full game and buy 2 months of subscription after that I will get 1 month free and we both will get free 2 place rocket mount.
Oh, I forgot, we will also get 300% XP bonus. So you will hit lvl 65 in a week or even less.

PM me if you are interested.