If you do not wish to receive game invites or messages from certain players, you can block them.

There are 2 ways to block other players:

You need to have an ongoing or a finished game against the player you want to block. Open the match, click on the opponent's avatar and press on the red icon on the right-hand side.

Another way is to go to the 'Social' tab and search for the player you want to block. Click on the player's avatar and then press on the red icon on the right-hand side.

To unblock go to the ‘Home’ tab and tap on the gear icon in the upper left corner. From Settings select ‘Blocked Players’, select the player you want to unblock and then press on the blue icon on the right-hand side.