Going straight tothe point...I worked in an international missionary school as the headteacher for 4years, This concluded term the new head of school ie pastor in charge of the region where the school is situated, decided to post me to another branch with a percentage cut down in salary and demotion,although the new branch is closer.I need urgent advice From career persons cause i am suppose to resume by 2nd january

Whatever the case is, you pointed out that it's a demotion. Let's say you are relocating from the Nigerian school to a school located abroad, for a lower position, it may be worth it. But this way, lower pay, lower position, then there must be a technical reason for it.

Otherwise, assess your options and get another job.

Plus, you may try to apply for an MBA in North America or something: They would love this your experience.