that I’ve finally managed to get the billing system to work with Google, after messing around randomly with some settings. Payments should now be fully automatically applied to invoices within a few minutes the same as Paypal and Nochex.
In theory there should be no need to open a ticket to get the payments applied, but if you do come across any problems or you don’t get a confirmation from usin within an hour or two then please open a support ticket.