It so happens that amazon.com does not publish it’s number anywhere on the website. Once you write them an email question, they respond to you within 24 hours (or so), and in that email, there are links for ‘if this email did not answer your question, please click here’, and that click takes you to a page with the customer support number :-)

For everyone’s sake, the number is 1-800-201-7575 ;-)