lost 10 Lp by accepting someone's invite while i was already in ban/PICK

this is so crazy, I was in ranked queue and got into a game, when i was in ban/pick, one of my friend invited me into another game, i accidently pressed accept, and system disconnected and i was placed out of the game and lost 10 Lp and another 30 mins waiting ! i mean this is so unfair, u guys need to give my lp back.