How to remove your Wix account
Use the link to delete your account. If that doesn’t work, you could still write a removal request to the named address there.
Direct removal link: http://support.wix.com/index.php/Delete_Account
Helpful Trick: Removing online data
Helpful Trick: Remove third-party logins
If you signed up for Wix using a third-party login such as Facebook or Twitter, you probably want to revoke all access from Wix. Click here to find out how.