Flipkart — Received wrong variant of product

Website:

Flipkart

I ordered RealMe GT 3 neo, 256 GB variant via flikart but received 128 GB variant. I initiated a return request on the same day and after 7 days they rejected the refund stating provided ID proof is not correct. Why flipkart need my Aadhar details for the refund, did they asked the same when I ordered the product? I request was raised from account and that should be enough for them to address the request. They delivered a wrong variant and now denying the return, this is cheating. Kindly resolve my issue as soon as possible.