Motorola Mobility — Amazon India / Motorola denial of service denial letter by motorola

Sir, Madam,

I bought a moto g4 plus with order#[protected] on amazon.in on September 16 2020. The phone was bought for my parents. After using for 7 days, the phone stopped working. Took the phone to Motorola service centre in Delhi (Tilak Nagar) however they refused to service stating that phone is out of warranty. When i contacted amazon India they are asking for service denial letter which the moto service center refuses to provide. Kindly help me.

Regards,
Nikhil