Adobe has provided these things:
Creative Cloud Help/Troubleshoot download and install issues
and brandnew: Creative Cloud Help/App doesn’t open; progress wheel spins continually
Tried these methods - several times - still nothing shows up, as the OP states
You can chat with a tech support expert in India: http://helpx.adobe.com/contact.html
Just follow the prompts until you get to CHAT. These people are very smart (and very polite), and have all the knowledge needed to solve your problem. Just be patient, and let them take their time in helping out your situation.
if you really clicked through the links from above you will find a question like "Do you need more help", which leads you at the end to the chat. And if "open" please use it, I had the best experiences too. I quote from Adobe's employee Preran: The chat button is activated as soon as there is an agent available to help.
And you you can have a look there: "Telephone numbers of customer service and technical support Adobe worldwide"
>>> https://www.adobe.com/eeurope/elicensing/licensemanagement/alm/contact.html (I used Europe's link, but that makes no difference.)