Gratuity and earned leave encashment to outsourced/contract employees

Dear SIr/s, I have worked in Manappuram Finance Ltd for 6.25 years on an annual contract basis with my contract being extended by every one year. I was terminated from services after 6.25 years. I have applied for gratuity and earned eave encashment . The Company has rejected the same stating that I am not elgible to the same. Kindly clarify whether I am not entitled to both, if yes, please suggest how to proceed against the company.