Amazon India — Coolpad mega 2.5D/doesn't allow to take back product as the specifications doesnt same as in amazon

Address:	601206
Website:	www.amazon.in

I have purchased this mobile and received on yesterday.there is return and refund available till 10/3/17.
Here in the specifications it is clearly specify that it supports 4g sim card in both slot and allow expandable memory card.its a hybrid sim as it was written in Amazon specification.but no where it is written that both sim doesnt support 4g network at a time.now they are not taking back and they say only replacement is available..but no return available.as per the advertisement it's very easy to return the product.infact they are not ready to take back and compelling us to keep this E-weast with me.