This is an open forum, not Adobe support... You need Adobe support to cancel a subscription
-start here https://forums.adobe.com/thread/1703848
-or by telephone http://helpx.adobe.com/x-productkb/global/phone-support-orders.html
--and two links which may provide more details, if the above links don't help you
I'm sorry you were not able to login for so long. Let's see if we can get you up and running on the new computer.
As far as signing in, your adobe-id is based on your email, so try logging in at adobe.com using your email address and then click on the forgot password link.
If you are a creative cloud subscriber, you are permitted to install and activate the apps on your primary computer and one backup computer. You will have access to both the Mac OS and Windows versions, so if you have a Mac at home and a PC at work, for example, you can install your applications on both. See the product license agreements page for more information. Read more in the Creative Cloud FAQ
I am not sure what you mean when you say it doesn't recognize the other computers. To load creative cloud on the new computer, the first step is to download and install the Adobe Creative Cloud Desktop. The CC Desktop application then manages the rest of the installation process.
You can download the installer for Creative Cloud from here : Creative Cloud Help | Creative Cloud for desktop
After you install the Creative Cloud desktop application , you will need to sign in with your Adobe ID and Password, so be sure to deal with the login part and resetting your password before you do the installing.
For more information about downloading and installing apps , see this link:
Creative Cloud Help | Download, install, update, or uninstall apps
If you can't remember which email you used or have further issues, you can contact support from this link: I still need help
You have purchased CC in January 2015 & have activated it in January & March 2015. It can be activated only twice.
Creative Cloud Photography plan (one-year) Desktop Subscription Jan 18, 2015
It is registered to this ID only.