See Official Servers - Terms of conduct, guidelines and procedures for how to report harassment and griefing. This thread can be found 
pinned on the front of the Conan Exiles forums.
Be sure to read these rules yourself too (goes for both you and the OP).
See also: Useful links on the wiki for methods to report issues.
Current issue report methods are pinned on the related (sub)forums. Methods which are no longer pinned are generally no longer applicable.
For example, the server issues report form was recently discontinued. Technical server issues are now best reported through G-portal’s site, but can still be submitted on the forums, although be it they may sometimes be handled with a small delay as it is a less direct way of reporting (the report has to be manually forwarded to G-portal).