OnePlus India — screen damage

Address:	Ranga Reddy, Andhra Pradesh, 500084
Website:	www.amazon.in/OnePlus-3-Graphite-64-GB

Hi team

I have purchased one plus 3 device around sep 14, 2016 through amazon site
Last week my screen was broken and i found out through internet about servify
When i submitted request to repair the device was taken
But the servify team says i need to pay 8550 for screen
The app shows me that device is under warrany
However servify team says you should have registered in app within one month of purchase
Amazon nor the oneplus3 device invoice has any information to register in this app
How would the customer know about such complimentary offers when you dont mention while selling