Disable voice chat completely

I’m playing this game single player as I don’t really have enough time to invest into the multiplayer aspect and I bought this game to do 1-2 hour runs during the weekend.

I’m constantly getting that teleport bug, where after I teleport to a location the UI freezes and the game gets stuck - I can navigate menus but I can’t control my character.

This seems to happen when the game is “joining voice chat”, which I assume means some other players (not in my friends list) are in the same area.

As Blizzard has no interest or ability to resolve this, is there any way to disable this functionality? I am not interested in voice chatting, and do not really care about seeing other players in my single player game, but I would like the basic ability in this game (teleporting) to work consistently and not freeze my game 2/3 times.

Or would a specific setting help in this regard?