Indian Postal Service — Lost my speed post with valuable documents

Address:

Hooghly, West Bengal, 712136

Dear respected Sir,
I Subhajit Ghosh Complains against Indian postal services, I was send some valuable documents through Speed post From Mysore, Karnataka ( Pin-570004) to Chandannagar, West bengal ( Pin-712136) on dated 11th Feb 2016 at 2.06 pm but till dated not delivered. ( Article no-EK[protected]IN).
Sir, I need your help.
Thanking you.