Sardar Sarovar Narmada Nigam [SSNNL] — redemption of ddb

Address:

Varanasi, Uttar Pradesh

My name is prerna singh and i want to know the status of a deep discount bond purchased by my father. His name is sudhir prasad singh, he purchased one bond of ssnnl of issue price is rs 3600 and face value is rs 1, 11, 000.
Registered folio no. - sn539134
Certificate no. - 571880
After maturity of the bond, the redemption amount i. E the face value should be received by him but as the bond was matured in 2014 but he didn't recieve any money or check and when he went to the mega quick consultants pvt ltd., blue chip investment cult ancy patna, 800001 from where he had purchased the bond, then he came to know that their office is not at that address anymore and there is no clue about other offices in patna.
So i would like to know the current status of his bond and how can he redeem his bond.
Please reply oas soon as possible.
And you can email on [protected]@gmail.com.