where i can buy original battery of yu yureka A5510 mobile

Replaced(in earlier one touch screen was not working) yu yureka note was received on June 28,2020. And again it was Defective. It does not connect to wifi .All calls incoming/ outgoing also Not connecting. Now the seller has refused to replace this Defective Mobile and want me to visit service center to get it serviced. I want a replacement/ refund of this product.

I using mobile you 5012 good mobile but I like mobile I want to mobile black colour panel 1 pair

Service center barabanki