duo q throwing games

i start up in champ select my first placement game. we enter where a blits player said his friends(draven and syndra) were on the other team. are midlaner went a support item and went mid and the enemy(velcoz) . my toplaner just died and did not help when i ganked. my botlane blits seemed just to feed his friends the entire game, it seemed my team gave up at 10 and just fed and let the enemy team win. By the end of the game i was near 100% sure that my team threw the game in purpose. What should i do because that game was really painful.