Firstcry.com — Wrongly described product and not accepting returns

I had purchased R for Rabbit High Chair for my son and the description given is that the product is suitable for 6months to 5yrs kid.
Once I placed the order, the product reached on time but the assembly was done after 4 days. Once it got assembled, I understood how bad the product is with respect to kid's safety. I purchased it since it is mentioned that it will fit for kids upto 5yrs. To my surprise it hardly fits a year kid forget 4-5yrs.
When I questioned the same, they are ignoring the age description given and just talking about the description which was given correctly.
I even challenged them to demonstrate with a 4-5yr old kid of any size to make him sit on this product. All they say is that as per policy the product can only be replaced and cannot be returned.

They took money and given a product with wrong description and now asking to keep the product which diesn't suite my needs.
Such products has to be kept under returnable policy only, I dunno why it was kept in replacement category. Customer service denied the request right on face. Cheap means of looting money, totally unacceptable.

Please take necessary action and help me get back my hardearned money.