Indiapost — wrong delivery of Item

Address:

Muzaffarnagar, Uttar Pradesh

Dear Sir,

I needed to return a product from Muzaffarnagar UP to mercahent in Delhi.i booked it through Indiapost via awb no EU[protected]IN after 5 days when i tracked online it was showing as delivered.after enquiring from merchent i came to know that Item still not delivered to them.
I complained online and to Director general Post New delhi,but i did not get any response yet.
Kindly suggest me further how to proceed.

Reagrds,
Pushpendra singh