Amazon India — wrong product send and not refund and replace

They all are cheater they send me wrong product
Order #[protected] order placed 28 august 2019
Total 7, 999.00
I ordered mi y2 he send me i kall keypad mobile worth of 1500rs
Pls help me i paid by cod they i check the package i front of delivery boy there is i kall mobile delivery boy said they can not do anything complaint on amazon they can help i also have unboxing video
And i complaint on amazon they said they do refund or replace he said wait for 5 days then after 3 days i got mail they said they can not issues refund in based od investigation report they said he delivered product but he don't know what in the package very poor and worst service
Pls any buyer/seller/other people/ can any help to solve the issus comment me pls help i m not born with silver spoon this is huge lose for me
This is my first order before i nevered order anything online first time = worst time
For contact me [protected]@gmail.com