/**
* Unsubscribe member
*
* @param string $email The email address of the member to unsubscribe.
*
* @throws \Exception
*/
public function unsubscribe($email)
{
// Delete user from all list
$this->service->delete_user($email);
// Blacklist user
$this->service->create_update_user(array('email' => $email, 'attributes' => array(), 'blacklisted' => 1, 'listid' => array(), 'listid_unlink' => array(), 'blacklisted_sms' => 1));
}