rank solo/duo

here is the thing,hope u guys can understand.iwas doing solo rank.if I win one more I will get into silver3,if I lose it I will drop to silver4.and my midlaner pick a troll champ and says it doesnot matter,he has LP to lose.so I doge the game.i hope if u guys can bring me back to silver3 test.(now imback in silver 4,and Im really mad.because I doge my rank drop.)ik doge is not good but there wasnot a choice for me.so I have my request.1:give rank a different doge*system to make this never happen again.2:plz bring me back to rank test to silver 3.i try really hard and this ending making me really sad.if there is someway u guys can do for me.plz help me tx a lot. :(

("bad people donot get punish and the player like me really try to improve suffer)