Bro, this includes failed txn also. I have paid 15L with Unipay but many atimes due to downtime failed txns cumulatively showing 2.9Mn instead of 1.5Mn. Sometimes I paid only 5000 but failed txn shown whole amount of bill due like 1.3L and it kept adding.
I was able to pay using my HDFC card after selecting SBI DC as payment method and then filling HDFC Debit card details on the page. @Lalsingh22 Mark this as solution for others to refer.
This could be temporary. SBI Unipay has removed the debit card option in the past as well, around June/July 2024, and later reintroduced it.
However, over time, payment gateways may start removing the debit card option for credit card bill payments.