Just getting a visa has suddenly become near impossible it seems. My daughter just applied as part of a small tour of models/entertainers that were going to he

Just getting a visa has suddenly become near impossible it seems. My daughter just applied as part of a small tour of models/entertainers that were going to help raise funds to build a church (in the US), and was denied, due they said, to no evidence there was anything to compel her to leave the US and return home. She is a minor, still lives with us at home, and goes to senior high school, i mean, WTF? Also, I quote, she 'wouldn't want to live in US, if they paid (her) to'. This same group have been going for several years now, but suddenly they were all denied this year. The kicker is the visa fee of around $300 is forfeit, the denial notice says you can't appeal, but you can apply again, if you pay again. Riiggght. I really feel scammed. Is it possible to sue? I know an Aussie friend who successfully sued Australian immigration in a similar case for example.