India Post — book post metter not delivered at destination

Address: New Delhi, Delhi

Dear sir,
We dispatched 02 packets thru book post, but till not delivered on destination
Tracking no. Cd[protected]in, cd[protected]in on dated 06-09-17
To
M/s vidya educational enterprise
30, suresh chandra ganguly lane,
Salkia, howrah-711106 (West bengal)

Please help the same to delivered or recovered to us.
Khanna publishing co. Pvt. Ltd.
4c/4344, ansari road, darya ganj
New delhi-110002
Tel no.[protected], 48