Infrastructure Development Finance Company [IDFC] — Misplaced Bond

Dear Sir,
My late husband had taken an IFDC Bond in 2017.
Name- CN venugopal, Chathanath Narayankutty Venugopal.
His DOB is 8/12/1948.
I want to avail of a duplicate bond.
How to go about it?
This bond was taken in Chennai. Branch is either Nungampakkam or Kilpauk.
Add- CN Venugopal,
C1 Gokulam apartment,
Ph- 3,
Sriram nagar,
Nolambur, Mogappair (W) Chennai.
No one stays at the above address.I stay in Bangalore at present.
My mail iD- [protected]@gmail.com- Mob no- +91 [protected]
LL[protected]

Thanking you.
Anuprabha

Ps- This is not a complaint.