AFK lost me 20 LP

Riot,

Our Illaoi went back at around the 9 minute mark of our game. She remained within the fountain, walking from one side to the next. This lost our team the game, which was otherwise pretty close.

Our team did nothing to provoke her, she left because she said she needed to do work.

I am wondering if i can get back the 20 LP i lost in this game.

Thanks!