I think $1000 is a lot of money to send to someone you have never met. It sure is a fortune for a Thai citizen to get. Also does she know, she still has roughly $23.000 to get over the next 4 years.
Either way good or bad it doesn't make much sense at all to me, why she didn't contact you yet or you are not able to contact her.
For now .... try to contact her from a different telephone number or don't use number recognition. Ask someone you know in Thailand to contact her with a Thai phone.
You are paying for her education, so it should be possible for you to see if she has registered at some college. I'm sure she told you something in her e-mails.
Anyway I can't say it's very smart what you are doing, but then again I never talked to the girl.