Cant leave a finished game

Someone was Ddosing or drophacked us during a ranked game and when the game endes and we went to the scoreboard and it wouldnt load up so i skipped the scoreboard and tried to join a new ranked game but it said i was already in a game and i tried to log out and login but it said i was still ingame when it already was finished for 5 minutes. I still cant get rid of the recconect to game. I cant do anything... I need help to get rid of it