Hi cocopops,
Your priority right now should be your kids. You should not have run off to the states to stay with your new girlfriend. What you should have done, is everything in your power to find a job and a new place to live. That would have showed your ex wife that at least you are serious about wanting a relationship with your kids. If I were you now, I would go back and try to build a life for yourself. Some credibility so that your wife will allow you to see your children again and become a part of their lives.