Postal Life Insurance [Pli] — after maturity no refund

My pli policy number kl-48925-cc matured on[protected].

On 12th nov 2018 i visited calicut pli office and counter staff informed that only installment updation upto april, 2015 is happened in my policy.

For updation of further installments i have to contact tvm office and provided 2 numbers

I contacted this 2 numbers and still i do not have any idea when i can encash my metured policy