Amazon India — product missing and amazon refused to replace or refund

I ordered redmi note 9 pro (Aurora blue, 4gb ram, 64gb storage) - latest snapdragon 720g & gorilla glass 5 protection. From amazon.in on june 30th 2020 and paid 1398/- rupees. My ordere no:[protected]. They promised to deliver the product on 2nd of july 2020. They delivered the package to me on 2nd july at 13:12 pm. I find the package little lighter on weight and the delivery guy came keep asking delivery confirmation otp (One time password) which was provided by amazon for secure delivery. Also a package was little torn on side. So i took video while unpacking the and i was shocked that phone was missing from the package. I immediately called amazon customer care team and informed what i found. I said i want to share the video i took while unpacking but they said no need of video we'll get back to you after five days. They assured me that they will get resolution for this issue with in 5 days. So i trusted them thinking they will take care of it properly. On 2nd day after giving complain to amazon customer care one of their associate from special team called me and inquired about the issue i faced. On third day another associate from delivery team called and asked me did the box come empty. I said it has a charger and a cable and phone was missing from it. He end the call after that. I hear no one from amazon after that. On sixth day i drop a mail to amazon at "[protected]@amazon.in" stating "i hope you have completed your investigation and have positive resolution for me."
They replied me in the following manner

Hello,

Thanks for writing to us.

We've confirmed the redmi note 9 pro (Aurora blue, 4gb ram, 64gb storage) from order #[protected] was in the box. The carrier delivered the intact box to you. The driver did not note any evidence of the package being tampered.

Therefore, we will not be refunding or replacing this item. You can view our conditions o[censored]se here:

www.amazon.in/conditionsofuse

Your understanding is appreciated.

Sincerely,

Account specialist
Amazon.in.

I thought they taken my issue lightly so i contacted them again with video o[censored]npacking the package they sent. They replied me in this manner again

Hello,

As informed earlier, your request for a refund on this order has been denied:

#[protected]

We are unable to issue a refund or replacement for this order because our records show the order was complete and in proper condition when it left our fulfillment center.in addition, the carrier has confirmed that the parcel was intact and undamaged when it was delivered to you.

Per our policies, placing an order for any reason other than a genuine attempt to purchase the merchandise is prohibited.

Since your account has been closed we will no longer be able to issue further refunds or accept further returns.

Unfortunately, we are unable to provide any further information regarding this situation. Further correspondence about the same may not be answered.

Thank you for your understanding.

Regards,
Account specialist
Amazon.in

Now my account blocked and they refused to raise refund or replacement. They say its the final decision from them. Even after sharing the video o[censored]npacking they are not understanding my problem