What do i do if i am an expatriate and my employer is not paying me

I am currently working as an expatriate teacher, but I am facing a challenging situation. For the past three months, I have not received my salary. Additionally, I’ve recently learned that the owner has sold the school. Given these circumstances, I would greatly appreciate your advice on the best course of action. Specifically, I’m unsure where to report the issue, what legal steps I should take, and whether the sale of the school affects my right to be paid for the work I’ve done.