Amazon — samsung galaxy m30 defective product

Website: www.amazon.in

I have received defective smart phone, I have complained about it to Amazon their executive cheated and lied to me saying that it is the manufacturing way of smartphones, I visited Samsung store to confirm that it is a defect.
Still they are not giving me return or replacement, and their customer executives disconnected my call 2 times, the technician also lied that their is no defect, when the gap in fingerprint sensor can be easily seen with naked eye.