Did you find a solution to this issue? I am experiencing the same issue. I had a contact form that I mistakenly forgot to include a captcha field so the form was carpet bombed with spam for a day. I now have a large number of spam submissions co-mingled with legitimate ones. I would like to delete the spammy entries but after selecting them and clicking the delete button I get a 404 message. As you stated in an earlier reply, the page URL never changes. It remains
xxx.com/wp-admin/admin.php?page=CF7DBPluginSubmissions&form_name=Contact+form+1
If it makes any difference, I have WordFence and WordPress Security Firewall installed on the site.
I can email you admin credentials if need be.
Thank you for your help!
