If you are in a hurry to use the software... if you only installed it once before you are allowed to have two activated installations, so you should be able to wortk with the newly download files right away. If/when you get a hold of the chat folks they will end up deactivating anything that is currently activated, so you would need to activate the new installation again following that. But there is no rush to get the old installation deactivated unless you need to have two working installations immediately.
The chat functionality is seemingly a game of chance... works well for some but not for others.
For the link below click the Still Need Help? option in the blue area at the bottom and choose the chat option...
Serial number and activation chat support (non-CC)
http://helpx.adobe.com/x-productkb/global/service1.html ( http://adobe.ly/1aYjbSC )