Buy amazon GV from amazon or other platforms like magicpin, GyFTR, etc.
Then, add the gift voucher to your amazon account.
Use your amazon pay balance to order your LPG cylinder.
It’s as simple as that. Mark this post as the solution if it helps.
In future, use this thread to post your queries:
https://www.technofino.in/community/threads/kotak-bank-811-super-savings-account-benefits-important-update-🚨-🚨.31516/