Life Insurance Corporation — claim payment

Dear sir,
my father policy with lic with policy number 81152451..with cover or 3,00,000…my father expired on[protected]. the policy is comenced from 25-11-94.and it has completed 18 years….we have left to pay lastpremium on 25/11/2012….and the policy status is active on 1/3/2013 when i took the statement….they told me that claimwould be passed as the status is active ..but when i place the claim forprocessing …they refuse topass the full claim and told that it will get only premiumpayment amount….so please helpme for the claim…..iam having document paper and statementofthe policy……….so please helpme for the same…