Amazon India — issue with my redmi note 7s

Address:

Brigade Gateway, 8th floor, 26/1, Dr. Rajkumar Road, Malleshwaram(W), Bangalore-560055, Karnataka, Puri, Odisha, 752001

I brought a new redmi note 7s on 5th September.Its already 4 days now.But it's not opening now.I made a complaint on Amazon regarding this and told him to replace it as its in replacement period.But Their answer is just disgusting.They can't understand my problem.They are saying to wait for 12 September for a technician visit to confirm its fault.I don't understand why ? As it in replacement period.