Question about punishments / Reports

Okidokie here we go,

so I just finished an extremely frustrating match where no one besides myself seemed confused or cared much (I was the support) and my ADC was a cait, anyways so in the beginning she immediately died and had about 4 CS score, vs 35 from twitch. I tried teaching her how to last hit and she said she was new at this (Ok) mind you everyone was around level 16-25 ok. So of course our lane got crushed and she went 3/14 NOW.. towards the end of the game I had 59 CS as janna and she had a mere 64 CS for a 36 minute game... (ouch).. okay my question is do they read the chat AFTER the game has ended? because I said she must of either purchased her account or is playing on a friends account. She then said she was playing on her friends account.. so do they read the chat once the game has finished? and is this not a reportable offense? I did report her.. but only for intent feeding unfortunately.

Sorry for the rant ;P.