Blocking all ALL communication

On the mobile client, how do I completely block ALL communication. I don't ever want to chat with my opponents, either during a game or after it. I've already set the "Allow Chat" to Never in the settings.

What you did sounds right but if it isn't working, you might explain what is getting through.

Are they able to challenge you to a rematch, for example? 

Or draws Are those guys still allowed to offer draws? What could be more of a communication than that?

They may be lurking in the forum too, just waiting to pounce on a question like this.

I have actually seen other topics where the chat setting isn't being honored. Which app are you using? iOS/Android and which version?

I am using Android. The version says v3.4.09 on the settings screen.

I know it's not working because an opponent accused me of cheating in-game this morning.

Yea, the never chat setting doesn't work on Android. What you have to do is click on the chat and you'll see a chat bubble with an x in it. Tap that, then chat is disabled.