Musician responsibility

Concert is cancelled in Hong Kong, two weeks before the performance, almost two months after paying for the air ticket. It is perfectly fine if a concert has to be cancelled due to varies reasons (better be real good reasons), but the fact that the director did not intend to inform me about the cancellation, until I happened to ask him about the concert, on Facebook. Seriously, this is not even a professional vs. amateur issue; this is about responsibility. Should I have signed a contract before I decided to attend the performance? I guess a paper is more trust-able than a person, which is sad. This person calls himself a professional musician and a teacher, which is even more sad---way to corrupt an entire generation of musician. Teachers should really learn about moral issues before they are allowed to teach, especially, young kids.

I never learned about fraud in school---way to spend an international air ticket to learn just that. Worth it?