Have you opened a support ticket? Until then, might I suggest taking advantage of checking the listings that you do not want in your showcase and making them hidden.
Membership Required
We're sorry. You must be signed in to continue.Sign In
or Register
When you block a person, they can no longer invite you to a private message or post to your profile wall. Replies and comments they make will be collapsed/hidden by default. Finally, you'll never receive email notifications about content they create or likes they designate for your content.
Note: if you proceed, you will no longer be following .