Some of our Bango numbers showed the credit card payment screen instead of the mobile bill screen. Raul investigated this and said the packages were not certified, which is some internal step of package creation. This bug is to track the fix for this.
Here's an example of an app that has an incomplete Bango package https://marketplace.allizom.org/app/pricetier4/?src=mkt-search
This was a configuration issue, its now fixed.