Poor quality Asus Zenfone MaxPro from Flipkart vendor

I purchased Asus Zenfone Max pro m1 grey 32gb variant 13/8/2018 i am refund complaint same day but Flipkart customer says no refund it’s seller policy only replacement says Mr yxxxxh customer care executive from Flipkart i says Sir please refund my money because product performance is very very bad…
(1) phone camera performance is bad
(2) hanging problem network up and down internet not working properly and heating issue but he says only replacement because it’s seller policy . please Sir help me as soon as possible.thanks regarding

Parag Ahuja
Modinagar 201201, Uttar Pradesh
Email: pxxxxxxxxxa@gmail.com