Hi I hv joined institute as a part time trainer .. at the time of joining they never gave me appointment letter or offer letter I worked there for one year ...now I have resigned for which I gave them 15 days notice period however I never got any offer letter but still due to courtesy I served them notice period of 15 days. on my last day they gave me relieving letter in which they mentioned I'll get my full and final settlement after 45 days ... which I did not accepted now plz suggest what should I do what are my rights as an employee