SteamID64 players you reported. (only pseudos are not valid, to help the steamid64 is included in the zworld profile page link, then if you want you can copy it)
Description of the problem with evidence. We want hard evidence to make a judgment that is neutral and useful to all.
No drama please, stay civilized and polite here. You're better than that.
Specify the time when this was done. For example 5 minutes or 1 hour.
If it is a rented server you can contact the renters from the host interface on the server in question or from the official servers page
Below each server there is the name of the renter which is a link that redirects to their zworld profiles, by clicking on their name you will be able to open the profile page of their Steam account.
You can always post your report here and send it the link if this discussion is to be shared with several people.