Flipkart — Flipkart Pay Later not working

Even Though all my dues are cleared on time every month and my KYC is active till 2030, why is my Flipkart pay later not working? I don't have any loan at the moment and my cibil score is also alright then what is the issue? The IDFC bank confirmed that the account is running and active from there side. There is no problem from the bank. If I have to use my card to buy then why do I need to buy from Flipkart, while I can buy things from other apps which gives far better service. I had been calling them since 20 days and everytime they ask me to wait. The issue has not been resolved since then.