Gratuity rules of minimum service in it/kpo/bpo

Hi All, I have served an organisation for 4 years 6 months and 10 days which makes it gratuity eligibility of 4 years and 190 days in a kpo industry working for 5 days a week. I have submitted notice through an advocate to the organisation asking gratuity , I have received response from advocate of organization that a minimum of 5 years to be served for gratuity. I saw many posts regarding these gratuity period but people have not posted the solution of their queries. Please share your experiences if you have received gratuity after serving 4.6 years in a IT/kpo/bpo industry and how ?