I am grateful to God that He saved your life from misery, probably untimely death. This is the kind of man that would seize your passport, wouldn't allow you to have access to the mailbox or bother to follow up with your Immigration process by withholding USCIS correspondences.
Four years wasted during the relationship is better than a decade in a marriage that is a definition of bondage. As others have said, cut your losses, take time to heal and dust yourself up. Because the whole narration of your relationship screams DOMESTIC VIOLENCE to me and wouldn't turn 360 degrees to become a loving one when you move in with him.