Ranked Problems

Was in a Ranked lobby game was about to start and then got a message saying something along the lines like (your game has ended) then my screen sat on your in a game screen so i closed my client thinking that would help in taking me back into the game but no!, I tried logging back in to then getting a message saying Authenticating account after 10 mins i got back onto the client only to see that it said i was the Leaver (Remake) and lost 20 lp because of it NOT HAPPY AT ALL!..