United India Insurance Co Ltd Health Pro Silver B — renewal of policy

hi there the matter is i gave a call to my agent to renew the policy and after checking out i found that my policy is discontinued so i went to the company but they denied to take my premium . now the matter is though iwas not aware of my policy my company didn,t send me any renewal letter as they send it to me before due date of insurance ,i asked them to give me the details of the courier company but they are un able to do so ,so my question is can any one help me to renew my policy