Dealing with unwanted content online is a headache, but you don't have to...

https://record-wiki.win/index.php/How_to_Submit_a_DMCA_Takedown_to_a_Hosting_Company:_A_Practical_Guide

Dealing with unwanted content online is a headache, but you don't have to suffer in silence. Start by taking dated screenshots as proof before you report the post through the platform’s official tools