Take a club and break principals head. Thats the only way out for you. No doubt there will be police involvement. But that is the only way you can make court wake up to your cries. Someone has to pay the price. Let principal pay the price. Forget the cases etc, it is basic requirement of teacher or principal to be empathetic. Unless the child itself has problem meeting you, principal cannot do what it has done. Or you simply take child with you when you want. It is waste going to court, by the time you get favorable orders your kid wont even recognize you. Thinkkk.