BUG

In My last game, on this one https://matchhistory.euw.leagueoflegends.com/en/#match-details/EUW1/3456300408/24426700?tab=overview after 20 min of playing my pc is crushed and i reconnected. So when i reconnected, i said "sorry guys" and everyone said "it's ok dude", then we grouped together and finished the game ! BUT in the end of the game i did not recieve ranked points, even on the contrary, i lsot my points ! Tell me please, how is it possible, chek out that game ! I carried it smth like 20 mins, got 1 dissconect, then i connected and in the finalle, i WON THE GAME AND LOST MY POINTS ? REALY ?