You have two ways to report a player:
- While ingame, you can immediately report a player with the "/report [player name] [reason]" command. You can find all the accepted reasons with the "/report reasons" comand. The most common reasons are chat, team, speed, reach, ka, and ign. This command should be executed as soon as possible.
- By filling the Player report form that you can find here: https://docs.google.com/forms/d/e/1FAIpQLScyMF1NaamFnq2khd-pNw_84FvRf0TVGeim3rpuSKXFG2TAyA/viewform
(discouraged! this won't be looked at very frequently)
advise to not say anything in chat about them breaking the rules. If they are cheating they would quickly stop cheating if you hackusate, so we wouldn't be able to get any evidence in case you haven't provided any.