How to remove your Zendesk account
As stated in the ToS ( http://www.zendesk.com/company/terms ) you can (request to) delete your account, and it seems everything will be erased. But where to do so? The PP seems to answer the question: If you () would like to () request removal of information () please contact us at email@example.com.
However, as is often the case with commercial sites, We may () retain and use () personal information as necessary to comply with our legal obligations, resolve disputes, and enforce our agreements.
Helpful Trick: Removing online data
Helpful Trick: Remove third-party logins
If you signed up for Zendesk using a third-party login such as Facebook or Twitter, you probably want to revoke all access from Zendesk. Click here to find out how.