If you have witnessed a violation of player behavior policies, you can report it by using a “complain” function.
To send a report from the castle, click the right mouse button on the player’s name or on the icon in the pre-match window, then choose "Report". If you want to open the same menu during the battle, click either on the hero's image on the top of the screen or at the window with the final battle statistics and choose “Complain”.
You will see a special window, where you can choose the reason for reporting, add a comment if you wish, and click "Send.”
Your message will be sent direct to the support team.
Please, take into account that a player can send not more than three reports a day.
Reporting violations helps to keep game environment safe from toxic behavior, so use report function wisely.
Please also note that you can use “ignore” function to mute other players. Ignore function is available from the same menu as report function and blocks incoming messages from a player (does not affect matchmaking).