Where/how to contact itunesconnect support?

I am trying to create an author account on iTunes Connect so that I can publish my books (https://itunesconnect.apple.com). This error message occurs when I click "Submit":

Encountered an error saving application, please contact itunesconnect support for further assistance

The FAQ does not address this issue. I cannot find any forum or website or phone number for itunesconnect support. Suggestions? Advice?