Converse with fellow players
@Saroka It's definitely frustrating running into a cheater; thanks for taking the time to make an account to warn the devs about it! As an FYI, there's an In-Game Suggestions sub-forum that may grab a GM's attention a little faster as I've seen folks like @GM-Deynger respond pretty quickly there.
However, I've also played games that remove posts like this with the rationale that they can inadvertently promote information about how to cheat. In case that happens, or if you want to be doubly sure this info is passed along, the best way to do so would be to submit a Support Ticket to the devs directly. This post provides step-by-step instructions with screenshots, but you can probably figure it out if you go to the Support => Contact Us menu option on this site.