Basically all our team disconnected

Ok so we were playing 5v5 ranked competitive game and suddenly we won the fight and we all disconnected, the screen just froze for everyone and we had to force shut down the league of legends client, after we reconnected enemy team was finishing our nexus, I am asking to return the LP, you can watch the video back as you wish. https://matchhistory.euw.leagueoflegends.com/en/#match-details/EUW1/3424975986/22165508