Dear Bansode,
One way or other, all those employed in any organization for hire or reward are workmen/employees and therefore, some time or other, every person in such paid-employment has to face some problems due to some omissions or commissions in the fulfillment of the contract of employment either on his part or on the part of his employer and to be inevitably in the centre of an employment dispute or industrial dispute. But the redress or remedy basically depends upon the employment status of the employed person. To invoke the provisions of a Labor Law for the redress of a specific employment grievance, the employed person should be a workman/employee as defined under the particular Law. Adverting to Judicial dicta, the legal position obtaining as of now is that though education is an industry, yet teacher employed in an educational institution is not a workman for the purpose of the Industrial Disputes Act,1947.
As I understand yours is a case of termination for abandonment of employment or unauthorised absence.
Unfortunately, there is no mention in your post whether you belonged to the teaching faculty or the non-teaching staff and any disciplinary action was instituted before your termination.
Had you been a member of the teaching faculty, you can not invoke the provisions of the ID Act for reemployment and recovery of the dues to you or the Payment of Wages Act,1936 for the denied salary. In such a situation, instituting a Civil Suit for breach of the contract of employment is the only available option.
If you were a member of the non-teaching staff, you can raise an industrial dispute u/s 2-A(1) of the ID Act,1947 against your termination before the Labor Officer as suggested by Mr.Dinesh or for the recovery of the unpaid salary file a claim u/s 33C(1) of the same Act before the Govt or u/s 15(1) of the Payment of Wages Act,1936 before the DLC.
In either case, you can file a claim u/s 7 of the Payment of Gratuity Act,1972 for gratuity before the Controlling Authority under the Act for your area.
Therefore, for the recovery of the unpaid salary and gratuity, I would suggest engaging the services of an advocate.