Amazon India — Amazon Online Shopping pvt ltd(prize division)

Address:

City tower complex, sasthitala lane, atghara, new town, Kolkata- 400052

I received a letter through India Post courier, in the letter, it was claimed to be sent by Amazon. They provided me with a scratch card, and after scratching it, it was mentioned that I've won a cash prize of Rs 7.5lac. (Images are attached)
I messaged on the given WhatsApp number, and they asked me to share my bank account details so that they can transfer the winning amount. This was a bit suspicious to me, so I cross checked with the officials of Amazon. To my surprise, they said that this letter was not sent by them and it's a fraud. Please take action against this, as some fraudsters are looting people in the name of certain reputed companies. This has happened not just with me, but also with many others around.
I hereby request you to please look into the matter at the earliest, and catch hold of the fraudsters.
Thankyou.