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There's 2 things to consider: 1) Do you want to pursue legally -now- ? It will take time and money, if you are without a salary, balance the effort required versus prioritizing finding another job. You can always get a new job first, and only then explore if you can recoup the money

2) As lathiat said, the legal options are context dependent, factors are: where you live, where the company is registered and operating, etc.