That "school" is, in terms of ethical behaviour of its leadership, one of the worst I could ever think of.

I have heard several times from different people that people from management have been accused of child molesting and that Western "teachers" there have had sex with some of their students.

So, what you have experienced may be just one of the things that come by the totally rotten ethical standards at this "school" in general.

No decent teacher should ever consider working for this garbage place!