Flipkart — Flipkart not offering support

I ordered a Green soul mid back ergomic chair that promised of support as an office chair for people beyond 5.6ft. I am around 5.5ft and this chair offers 0 back or thigh support. My back hurts and the seat is so small that their is issue with blood circulation.
Despite the wrong product description Flipkart is adamant in not taking return of the product, while assuring that they will resolve it. They are redirecting me to Green sould who are blaming everything on Flipakrt. The chair came unpacked and the delivery status too wasn't updated till 4 days after the delivery. PLEASE HELP!!