First you might want to block purchases on your card to Origin. And i cannot see how some one can tell you really on here maybe some wild guesses and you saying your trying to get in touch with them which you might want to try emailing them too.
I don't know if you can pay Origin though paypal and if it been done that way get in touch with paypal and make a complaint.
Good Luck hopefully you will get it resolved and if you do happen to see the games pop up on Origin don't download them or any thing.
P.s hopefully Origin will give you the account name that they were got on too and i my self be considering getting a new card in case the leak was from adding your bank details some were and might want to check your comp(s) for any malicious.