Flipkart — Unable to add flipkart gift card to my Flipkart wallet

Website:

www.flipkart.com

I got ₹500 Flipkart Gift Card on August 29, 2023 which I am not able to add my wallet. I am getting this error, "This card belongs to a wallet and direct transactions are not allowed on this card." I've contacted Flipkart customer support many times but they aren't solving my problem. They are only saying we can't see your gift card. I have no such information. It's 4 days now and seems they don't even want to solve my problem.