Shortly after an Adobe forums visit during which I clicked a link that led to an image on a Creative Cloud page, I received a "Welcome to Creative Cloud, we're glad you joined" email. I Did Not join, and I'd like to know how to deal with this. Customer service does not seem to have an easily-located email address.
Please check the status if you have the CC by clicking on the below mentioned link under "Access your account information":
If you have the CC membership then you may cancel following the same link under "Cancel membership".
You may also contact Customer/Chat support:
Let us know if this helps,