For Hangouts please visit https://support.google.com/hangouts or post a question on the help forum https://productforums.google.com/forum/#!forum/hangouts where we have experts on Hangouts concerns.
You can use this article to report content https://support.google.com/legal/troubleshooter/1114905#ts=1115658
You can use this article to report content https://support.google.com/legal/troubleshooter/1114905#ts=1115658