Does anyone know why half the games i get into, voice chat and text chat both dont work? it literally has ruined several of my competitive games and its been like this for a while.

I played a game vs a blatant wallhacker/aimbotter. He had 45 kills in 14 rounds insta killing everyone etc. I’m currently in dia3 and he boosted his friends from plat 1 to immortal 1. (I added him to see his match history). I reported him s...