1.Terms & Conditions set out in the appointment order has to be looked into. If notice period of 90 days is stipulated on either side, then the Company is bound to pay you the entire salary admissible, except HRA.
2. Send a legal notice through a Lawyer to the Company to honour its own commitment.
3. Complain against the Company to the Regional Labour Commissioner about the unfair trade practice being practised by the Company.