Cannot pay because invoice is showing incorrect price for CB Starter for 500 users.
Price is supposed to be 19 €. The invoice is showing 9000 €
See screenshot of invoice attached
You have hit a seldom bug (the amount is big to make sure that nobody pays it by error) that is in the not yet released options plugin. Sorry about that.
Just login, then click "Cancel payment and subscription" at bottom if you see that invoice again, and click the "Get it now" button for the item you wanted to purchase, e.g. for CBSubs (starts at 95 EUR for 500 users):
www.joomlapolis.com/cb-solutions/cbsubs