You paid your credit card bill late, right? This means it will be reported as a late payment, which has already been done. So, what are you waiting for then?
In case you don't want to choose violence😅 you can give them Experian report. You can get it for free from WhatsApp.
https://wa.link/eah5rv
Just send Hi & follow the next process. It's an official report so it'll be valid for them.
But if we contact bank directly they usually respond we recieved your payment late so we can't do anything about it.
We are not paying directly to IDFC right? we are paying the dues to Amazon so it's their responsibility to make sure everything is done on-time.
Happened with me in ZestMoney.
First, try Amazon because they may have additional details to check whether you missed a payment by any chance.
If they responded positively then you can show it as a proof for raising a request with IDFC.
Chances of your application getting approved is low because you have only 6 month old credit card.
As @Vasuki mentioned you should have atleast more than a year older credit card to get an easy instant 2 min Maggie approval.