How do you report someone for cheating?

[HRGSurplus]

I have proof that a person cheated but it isn't allowing me to report the player for doing so action. I also believe this dude is a hacker as well. I played a game of Earth. I was active player and won two objectives. Some stupid reason, the opposing player gained those 2 objectives first even though I was the active player and also achieved the same objectives at the same time. I want to report this player ASAP!!!!!

[GTSchemer]

First, review the rules. Are you aware, for example (see https://boardgamearena.com/doc/Gamehelpearth) that objectives in Earth can be claimed simultaneously, and score after reveal, as shown in the replay log here? https://boardgamearena.com/gamereview?table=460427805