Won a ranked game, counted as a normal game/

Just played a rank game as vayne, won, it showed up in my match history as a normal game for some reason, I also did not receive my lp which would of put me in a division series. Also, it shows on my character stats used to be 2wins-3losses, after the game it was 3wins-3losses, proving it was a ranked, but it for some reason counted as a normal game. any way i can get my 20lp back? lol