Then tell her you won't help her anymore if she won't let you contact her parents or get a trusted adult in her country
in on things.
I am being utterly serious here. This is well above your pay grade and you can't truly help her, anyway.
Of course I don't want her getting smacked around if her parents are like that, so another trusted adult is okay--- and I mean someone who isn't afraid to push back hard on this guy.
And finally, while I realize that she's just a child, the fact remains: play stupid games, win stupid prizes. She's brought over half of this on herself, and isn't mature enough to have a phone.