I just won my series but i didnt get promoted

I just won my series but i didnt get promoted,first game i have lost but then i win 2 in a row and i didnt get promoted to platinum 4,how? is that a bug or what?

As you can see game is on replay.gg : http://www.replay.gg/search/eune/rivensoloq and its visible But i cant find it on my match history or on official league of legends site match history like i didnt even played that game....... U can check if u want to http://matchhistory.eune.leagueoflegends.com/en/#match-history/EUN1/201439552