In case you haven't already, you should submit a request to delete all your data as a Mailchimp "Contact" (a "Contact" is a person whose contact info was given to Mailchimp by a Mailchimp "Member"):
Seems like wufoo (the form service they use for that form) is having a bad day, the form won't load for me.
It also feels a bit ironic that to ask mailchimp to not store my data I need to send that request via another company, do I need to ask them to delete my data too?
https://mailchimp.com/privacy-rights/