Adobe has provided these things:
Creative Cloud Help/Troubleshoot download and install issues:
and (no longer) brandnew: Creative Cloud Help/App doesn’t open; progress wheel spins continually
and so too Download and install Creative Cloud apps
If necessary and for further questions click through http://helpx.adobe.com/contact.html 'till you arrive at "chat". If "open" please use it, I for my part had the best experiences. I quote from Adobe's employee Preran: The chat button is activated as soon as there is an agent available to help.