For credit/debit card:
- Please confirm with the bank that your card has been enabled for online transactions.
- Ensure that the correct OTP has been keyed in during the payment process.
- Check your bank balance to verify that there is sufficient funds to be transferred.
- Clear your browser's cookies and cache.
- Please wait 1 hour before making the payment again.
Alternatively, try making the payment with a different debit card or credit card.