I got banned for feeding

I opened a game of normals and decided to play with my little brother and learn him how to play.I got put on mid lane and my teammate who was picking zed banned my champion and said i will go mid, and I decided not to let him and i got mid with him.I let my little brother play and told him what does flash and ignite do and I ignited the enemy renekton who was mid and he killed me.I let my little brother play for a little and he accidently fed the renekton.Then I got to the laptop and played.I got 2 kills and some assists and we lost the game.Can you unban me, I did not intentionally feed.
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