Flipkart — Ifb microwave delivered with tamper seal, return rejected!

Address:	560068
Website:	www.flipkart.com

I abhishek mishra, ordered an ifb microwave from flipkart and set the delivery at my friends address.
Order number is - od[protected]
Refund (Return id:[protected] rejected.
It was delivered within time frame, but the seal of the product was already tampered! I raised this issue to flipkart customer support, they asked me to wait for installation and if everything looks fine, then there is no need to return.
Now, till date installation is not done. Flipkart is not scheduling the installation at the time of my availability. And now they are not even accepting my return request! My return request for the product has been rejected, stating that it was rejected by the seller.

I am feeling harassed by them and i really don't know what to do at this moment as i am not very used to with online shopping.
Pl help me if possible as i have lost all hope from this fraud seller and the brand "flipkart".