Game Connection Unavailable

Ok.. so today, I tried playing a game of LoL, the 1st game, It wouldn't let me connect at all & I don't know why. The next 3 games it let me play. Won those games. But the last game, it wouldn't let me connect at all & gave me leaver for no reason. Can you fix that?? I wish to be able to play this game normally for once. THank you