While my Steam account was hacked, it was linked to an origin account I didn't know. Steam couldn't solve this problem, so they asked Origin to inquire. In this case, please tell me how to break it.
Sorry to hear you were hacked! For the security of your account, we'll need our live support team to have a look into this with you. You can reach out to the team for help here: http://bit.ly/EA_Contact_Us