Your best bet is to follow the reporting procedure described in the official server rules:
Since your forum account is new, you might not be able to send a direct message right away. Here’s how to deal with that:
NEW FORUM ACCOUNTS: Please be aware that newly created users can’t send private messages until a certain threshold has been met, which is to read 5 different posts, 30 different messages, and spend 10 minutes logged in. This is to prevent automated spam.
Bear in mind that the staff has to deal with a high volume of reports, so it might be weeks before they act on your report.
Good luck 