NEW CLIENT BULL****

After the champ select in a rank game, my loading screen went black, so i alt-f4'd When i reopened LoL, i was unable to reconnect to the game. I would hear the noises made when in game, such as first blood, but unable to reach the game. It was during my promos and i got a lost for it. Many problems happened to my friends as well. This is bullshit, and frustrating. Fix this shit and how can i get the previous client.