Please look into my match riot

Just played a ranked game with a duo who began the game by saying they were diamond mains, then every mistake they made the blamed me for it and began to flame me so i muted them, a little while later i unmuted them because the game was getting close and communication was key. We won a fight and i said gj team. Then they began to feed intentionally and saying stuff like "see what you learned blitz" you have to look into this game smurfs or not they were horrible people and wouldnt think people of that elo would do that.