Have a look at this recording.
(basically what is shows is that if you go the settings page on your app editor and then pay from there, it will follow a 3ds flow (which will ask for mobile otp verification as required in any transaction on Indian cards) Hence this will work for you )
I successfully got my subscription through this method on 2022-09-20 with a HDFC credit card.

This will method will not work for plugin or template purchase. (you will have to get a forex card for those).

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