Flipkart Apple - Wrong Invoice for Apple Mac mini bought from flipkart

Dear Sir/Madam,
I have bought a Apple Mac Mini M* from flipkart on **th June **** and it got delivered to me on Saturday i.e **th June ****. After receiving my shipment i checked with apple to verify my warranty and if my product is genuine on Apple Official website - https://checkcoverage.apple.com/in/
While doing so i entered my product serial number from my box and the website says me that the purchase date for my Mac mini is not validated in order to validate i contacted apple support they asked me to share invoice so that they can verify purchase date and other information and validate my product and start my warranty from given date of invoice.
So i shared my invoice i received from flipkart and apple support checked it but they informed me that they cannot verify/validate my purchase the serial number for my product is not mentioned on invoice instead thay have mentioned some other number maybe UPC on my invoice and hence, they asked me to contact flipkart and ask them to provide with correct invoice that contains serial number that is written on my box.
After that i keep on complaining but they just close my case again and again now it's been ** days since my purchase but no resolution has been made yet.

I bought this system on emi and I am a middle class person who has a family to support i request you to please help to get Warranty for my system which is my right.

Flipkart Order ID - OD******************
Apple Case ID - ************