Email support. I’ve never known them to be unresponsive (often in just a few hours), but I’ve also never seen them respond to a tag on a story.

They will tell you what I wrote in my story. YOU, as copyright owner, have the sole right to issue a DMCA take down request. (They have a compilation copyright, but that may be harder to assert, since the specific arrangement of stories differs.)

I’ve complained to itchy’s newest web host and their domain registrar.