Life Insurance Corporation of India [LIC] — delay in claiming the policy

The policyholder is dead and the nominee is suffering from cancer and there is no source of income.
Claim is submitted but it is being delayed inspite of requesting it a several times.
What is the use of lic if the nominee is not getting its benefit.

This is really disappointing. Poor service from lic.

I would like to complaint about it.
Please claim the policy as soon as possible.