It sounds like pain and disappointment, understandably. I would definitely try to talk to her and acknowledge her feelings and offer my service of listening and caring. Being in touch around a birthday is a big deal. If you checked in before, then you should checkin on the birthday and after the birthday to talk about the expectations and reality if she has that need to talk about it. As far as a direct response, I would acknowledge that the situation sucks but I guess I’d try to let her know that the situation is temporarily out of her or her parents control and that everyone is trying their best to give her the best outcome in the long run while they do their work.