my CC cleaner is under an old email address, how can I get access to my ccleaner
CCleaner Professional will work on your computer anyway.
However when you have purchased a licence then that licence account is tied to the email that you used when purchasing.
To change that you will have to contact support giving both the old email that you used when purchasing and the new email.
Of course if you contact them from your new email it will not be registered as a purchaser, and so it will take longer to get a reply.
The contact form is: https://support.ccleaner.com/s/contact-form?language=en_US&form=general