I think it is far loo long to attempt to overturn the original judgment.
The above is general legal and business analysis. It is not "legal advice" but analysis, and different lawyers may analyse this matter differently, especially if there are additional facts not reflected in the question. I am not your attorney until retained by a written retainer agreement signed by both of us. I am only licensed in California. See also avvo.com terms and conditions item 9, incorporated as if it was reprinted here.
It might be possible to bring a motion or an action to set aside the original judgment, if the court never validly obtained personal jurisdiction over you. You need to have a lawyer review the documents supporting the original judgment.