No refund or replacement against Asus Zenfone max pro m1 manufacturing defect. 2 major defects found

Asus Zenfone max pro m1. No replacement or refund against manufacturing defect. 2 defects identified. Horrible customer care service. No replacement of purchased phone. Fone has manufacturing defect, so it is sold at discounted rate. I am calling Flipkart everyday, and there is no resolution, no replacement and no refund. Asus 13 mp Camera quality not as good as Samsung 12 mp J5. Call quality and gps sound in car is horrible with too much background noise. Other person on call cannot hear my voice on auxiliary connection. Samsung is much better in this feature. Total disaster phone if you connect in car and try to speak hands free. Flipkart technician from Jeeves does not understand this problem, nonsense technician sent by Flipkart. Do not buy such discounted phones from Flipkart. I want to sue Flipkart and stop all purchases on Flipkart.