If someone is harassing you or someone you simply don't want to hear from anymore, the best way to stop it is to block the player. Here is a guide on how to block a player you no longer wish to get messages from:
- First, search the player's name in the Friends panel.
- Click the left-pointing arrow next to their name
- Select the option Block 🚫
After you block someone, your conversation with that player will be removed from the messenger, and the person can no longer send you messages. If you change your mind, you can unblock the player as well. You will find all blocked players in the Blocked tab in the Friends panel.