I get this - "We are sorry, an unexpected error occurred processing your request. Please try again." every time I try to renew my Photography Program plan. This has been the case for three days now...
Since this is an open forum, not Adobe support... you need to contact Adobe staff to help
Chat/Phone: Mon - Fri 5am - 7pm (US Pacific Time) <=== NOTE DAYS AND TIME
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Creative Cloud support (all Creative Cloud customer service issues)
-or by telephone http://helpx.adobe.com/x-productkb/global/phone-support-orders.html