Sony — Tv display gone less than one year use.

I purchase SONY LED TV from Lulu connect, cochin on 04.09.2021.
Now its display not showing only sound came while switch on TV.
We use less than 1year at that time itself display damage. Poor quality of the TV. Please replace the TV or refund the amount collected when we purchase.
I alredy complent where we puchase tv last week, still no responce from them.
On 15august sevice technician came he confirm that display gone. Service report also attached.
I already send so many mail to sony care and where we purchase shop still no responce.
If your product is bad you must refund amount when we purchse.