Banned - failed to resolve dispute - https://www.epicnpc.com/threads/1094227-Final-Fantasy-11-account-scammed-by-epicnpc-super-moderator-Akane/page2
You can contact the customer support. After a long process of confirming you're the OO, they'll allow you to link it to another Google+ account.
I'm not sure how they proceed with GameCenter though.