match history not recording

My match history from today hasn't been recording, only showing games from last night. If i click on leagues then match history it only shows games from august 1st and down. Im really concerned because i came across a player who preformed a ddos attack on the enemy team (she got dived and the two people who dived her were then disconnected from the game for about 15 minutes) she claimed to be the one responsible among other unpleasantness we disagreed about what she was doing.