Adobe contact information - http://helpx.adobe.com/contact.html
Help for Download & Install & Setup & Activation http://forums.adobe.com/community/download_install_setup
Next link has a "Chat Now" button near the bottom http://helpx.adobe.com/x-productkb/policy-pricing/activation-deactivation-products.html
Chat may be your best option... Adobe technicians MAY be able to remotely get your computer working (this is a user to user forum, not Adobe support)
iCloud is an Apple service and has nothing to do with Adobe software, so if that's the service you just resigned for, it won't help at all with Premiere Pro.
Adobe's subscription service is Creative Cloud.