want to know where I stand

So I just had a game of ranked and i played supp MF (dont judge people) and the adc i had went off his/her head stating that i stole adc (when i was building supp items) and throwing verbal abuse at me like no tomorrow and then stating that he/she would email riot and have me banned because i'm trolling. I'm no troll i have spent far too much money on this game and its beyond a joke that I even have to worry about this, but what happens if I do get banned? Can I appeal it? cause I bloody well will. Thank you for the advice in advance.
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