Amazon India — faulty product delivery

I have bought a product (Redmi 4) from amazon.com on 24/10/2017 and received the product by paying rs8999/- through cod. Everything was ok but received a faulty adapter. They assure me to replace the adapter along with the mobile but they gave me 1month time.in spite of paying the exact amount why we the customer are being harassed. Why don't they make sure that the products they sell are in working good condition.in the process of return and replacing we are being suffered as it wastes much of our time without much profitable result.

So please warn the company as well as the seller to not to fraud and harass us. Hereby i am providing the product as well as the seller info below too.

Product-redmi 4, 32gb gold, ordered on 18 october 2017 order#[protected] from amazon.com

Seller:-green mobiles
Building nos. 1 & 2, agsons global logistics park,
Vill. Kishora, main gt road, opp. Tau devilal
Park
Sonipat, haryana, 131021
In

Thanking you,
Sandip karmakar
[protected]