Amazon India — oneplus 6

Wish facebook comes with negative rating i would be glad to give amazon indian the most negative rating a customer can.
Ordered one plus 6 got the delivery on time. The phone came out to be defective called the amazon for replacement i was informed first tech guy would diagnose the phone submit a report and then wil push for replacement.
The next thing i did was walked in to the service center. They diagnosed the phone and informed me that the phone is defective and i am eligible for replacement.
They provided me with a doa certificate and asked me to mail amazon and they shall send replacement
I then called amazon and informed the same they said they are not concerned with any doa certificate they follow there own policy which is tech person wil submit the report and his report would be considered apart from that they are out of stock so as in when the stock comes in then they will be able to send a phone no commitment on the date so it could take a month also.
I asked for refund they said its not possible. No replacement no refund they just going to sit with consumers money and relax