You can recover your username and or password by going to c2.link4cloud.com.

Then click login once It will present you with an option for forgot username and or password 

Follow these steps.

Since you have the email associated to the account do username and the password, from there you will be able to gain access to the account and removed or turn of email notifications.

And in case don't remember the username if you have another email that you use I would recommend creating a new cloud account that we could then add that controller to.