I am so sorry and hardly know what to say. I would imagine that's the reason no one else has commented on this thread. Your situation is so incredibly painful and just as unfair. It may take years, but there's still hope for your kids. Don't forget that two-thirds of kids leave the organization. If I were you, I would send all three kids monthly messages about how much you love and miss them and that you'll always be there for them. Stay upbeat, and let them know what's going on in your life.
Is there any way to have the court order counseling or mediation for you and your kids? This is just a terrible situation.