Hi Abhimanyu
Apologies for the inconvenience caused.
Please be informed, only a Credit/Debit card is accepted as a valid payment method for Azure subscriptions. Please use a valid Credit/Debit card that has international transactions enabled. Also, note that Rupay is not supported for transactions in Azure. Microsoft accepts VISA, MasterCard try these.
Kindly check the below documentation for more details
If this answer helps kindly accept for any assistance ping here thanks much.