Is there a way to report players?

I was playing commander against two guys, one of which didn't like my deck, so he decided to wait 4 minutes between every click to make me concede. The other guy obviously left the game. Is there a way to report this player? Are measures planned against this type of player?
If you want I can provide his nickname and screenshots of the chat where he says that he's gonna make me wait.
Thank you in advance for your help
If you want I can provide his nickname and screenshots of the chat where he says that he's gonna make me wait.
Thank you in advance for your help