First your designation is manager. However, if you come under the purview of 'workman' as defined under the ID Act, then things would be easier. Whatever it is, whether you are a workman or not, you are entitled to your dues. You have to first claim such dues from the company in writing/ through legal notice. If it is not paid then you can move to court and claim accordingly. Better to consult a lawyer with all your documents so that important aspect like whether you can come under ID Act or not is decided at first. You can definitely take help of union but complaining before police station will not be of much help in your case I believe.