Flipkart — Seller rejected return request for product that was falsely advertised on flipkart

I ordered F&D F210X from Flipkart on 5th of August. The title of the product states "F&D F210X 30 W Portable Bluetooth Home Theatre (Black, 2.1 Channel)"
which clearly means the speakers are rated at 30W according to Flipkart.
Even the option to choose the variant states 30W, 74W, 84W etc implying the product is rated at 30W.
Upon receiving the order i saw in the manual and the box that the product is rated at 15W instead of 30W. I was greatly disappointed as it did not fulfill my requirement and expectations in any way. So had to return. Placed return request, was supposed to resolved by 9th Aug. On 11th seller (SVPeripherals) rejected my return request. Return window is open until 13th Aug.
I am attaching the product page(where it says 30W) and the photo of the box and the manual where it says the speakers are rated at 15W.
Please help me with the return as soon as possible

Refund ID :[protected]
order number : OD[protected]