As noworries said right click over the wizard's profile in the upper left of the UI and report and block the player.
or you can email snapshot at firstname.lastname@example.org
but the report button is best.
sorry but I deleted your post as it wouldn't let me remove just the screenshot and we try to keep from naming and shaming players on the forum.
shame this happens in game but it's a better community than most online games I've played!