Ok here it goes.
Call blizzard and tell them that your email you have registered now is bugged. Ask them to change it for you. Then write a webform asking them to change your secret answer for security reasons. Now the account can be still retrieved with an ID.
(If you do this, the secretanswer step can be skipped) Buy two new cd-keys normal and bc. Create a new account with the last name of the account you scammed. Transfer the character you want to keep, on the new account. Then ban the old account with an outdated hack.
This will hopefully make the account yours.