India Post — not received post

Address: Bangalore, Karnataka

Hlo sir, my friend has send me one normal post from pune on 1/9/2017, the post is very important to me as it carries my marksheet and paasing certificate of b. E. But its now almost 40 days that i havent received yet. Any help will be deeply appreciated. On post senders addres is written:

Senders address:
Deepak kumar s, no 18/2 and plot no 86 runwal park, dighi pune -411015

Receivers address is written : amit bhardwaj, inteva products india automotive private limited, manyata embassy business park, n block, 4th floor, nagawara, bangalore -560045