Life Insurance Corporation of India [LIC] — annuity no 22420/870, 22420/1387 & 091m[protected] (pension no-34)

My father was working with standard chartered bank. Post his retirement, he use to get pension which was subsequently transferred by standard chartered bank to life insurance corporation of india.
With reference to the above mentioned annuities, have sent two emails to the following email ids during feb and april 2020. Till now, i have not received any revert or even know whether my email is reached concerned team of not.

Pgs. [protected]@licindia.com and [protected]@licindia.com

I lost my father and want to know, the validity of this nomination from his pension perspective.
Can you please let us know what type of pension he had received all these years from the above 3 annuity reference number perspective.
Is there any amount commuted by him towards his pension, which can be due to the survivor or the nominee.
What are the procedures to be followed by us.