School not paying the salary/ Not clearing my Account

Dear Sir/Ma’am, I joined to a newly open Private school as a Vice Principal but after passing one month the Directors of the school asked me not to continue school without giving one month extra salary. They gave me very silly excuse behind taking such decision against me. After passing two months they again called me back when they needed teacher and asked me to rejoin the school and assured me that they will not do that act with me again. Because of their sweet corn words, I rejoined school. But just before summer vacation (after passing two months), Directors asked me not to continue school and crossed all limits while talking and charged bank of unbearable lewd Allegations on me. Their words were very cunning, not like any teaching Institution. When I requested them to clear my Account then they replied, “Why you are asking about your wages”. More than two months has been passed but they haven’t cleared my account yet. Many times I called them. I have been giving my best for the school. I worked more than 9 hrs. in a day. Some time I worked around 12 hrs. in a day, which is completely against the norms of any school. I have not taking classes in school but taking classes their other Teaching Institution too. But in revert back they duped me and did such act with me, not only charged false allegations on me, kept my all work wages too. I don’t have any Joining Letter or any Proof of Work cos as we know hardly such private school’s provides such type of Letter. Although I have made signature on the attendance register and all Students of school and their Parents know me very well. I went to Labour office but as per them Teachers doesn’t comes under Labour Act. Please give me your advice because I betrayed by them twice. With best regards,