OK, let's slow down a little here.
Before I start, I would like to make it clear that this is an incredibly sad, and highly emotive situation for all involved, and I'm not going to dispute that.
HOWEVER, with regard to the parents and the way they have acted, it would absolutely not surprise me that:
A) They never met the surrogate, and liased entirely through the agency.
B) They believe the boy with Down's to have been terminated, and they do not know that their daughter still has a twin.
The agencies that operate these rackets are highly immoral and incredibly unscrupulous (to put it mildly). It would not surprise me one iota that the agency has taken the parents money, pocketed most of it whilst feeding the parents what they want to hear, and screwing over the surrogate at the same time.
Yes, the parents may of course be complete bastards, but they may also be completely in the dark about what's going on. I don't know, because like everyone else on this thread, I'm not directly involved in the situation.
The issue of paying poor women from developing countries to act as surrogates, the issue of the abortion of babies with Down's make this whole sorry scenario even messier.
Calls for them to be named and shamed (and the inevitable death threats, harrassment and assualts that will go along with that), calling for their daughter to be taken away etc may just be a little premature at this stage.