The pictures are unique because they hold the link to the page from which they were shared.
This page is where questions are asked and answered.
You have to Submit a Request https://support.pinterest.com/anonymous_requests/new on the support page and then wait for your request to be answered.
Your email address is attached to the request so you will likely receive an email when there is an update to your submission.
Pinterest will not likely return calls from customers unless there is an issue the company needs to resolve.
Problems with personal accounts should be addressed on the support page.