Not really much you can do, The deluge will slow down and then stop.
What I would suggest for the future though is that you becareful when downloading stuff from the web, If you have to supply an email address use a throwaway account (like hotmail) and keep another email address for private/personal use.
Also, anytime you get a spam email with 'click here to unsubscribe' - DON'T - It just confirms your email address is active.
Hope that helps,
Gary.