I hope you learned your lesson.
That school costed you $600.
Of course you can't get refund, when you heard that criminals are giving refunds?
Don't answer to this and similar phone numbers, block them from your phone and stop thinking that somebody on the phone can give you anything. They are just taking.
I'm getting phone bombed by a Money Scam system and this is one of many numbers they are using, If they leave a message they don't speak good english, hard to understand what company name they are using, don't answer or call back, not worth your time.