Unless the employee manual provides for it, or you have a contract that provides for it, you need to negotiate for any severance benefits. You would need to consult with an employment lawyer for advice with how to do that.
Based on what you have provided here, I do not see a viable legal claim. I am sorry.
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You don't appear to have any facts providing you with leverage. Seek out a labor law attorney who will review things with you in detail.
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