Alternatively you can use Sriram one app for cc bill payment.
Benifits-
Try paying more thann 100 rupees per cc bill payment on each transaction and you can earn 5 rupees worth sriram coins on every transaction. (Note -Maximim 5 payments are allowed per creditcard per month, and payments should be done via sriram one UPI only) and you can use sriram coin for bill payment like inopay.
You can save ₹25 per card for 500 rupees of payment.
After this payment for every card you can use inopay for rest of the due