Surely if there is truly a bug or an unexpected system behavior (double billed, etc) you would have someone work with the customer? This is one of the biggest pain points for using Google products.
I would use a public bugtracker and a separate email for customer/billing issues.
But those are easy to resolve and if you setup is solid there should not be too many issues.
Surely if there is truly a bug or an unexpected system behavior (double billed, etc) you would have someone work with the customer? This is one of the biggest pain points for using Google products.