This is exactly what happened with me!
This case is closed for me just to be fast and clear somethings for the community before i close it, yesterday i got my thread deleted for naming and shaming (i don't blame mods they are doing their job).
However just to be fast and clear (don't wanna bother myself more), yesterday i had a video 2 minute, couple screen shots, 1 video 27 seconds i still have them 100% proven intentional leaving me to die etc getting executed enemy turret twice leaving lane and more..
First i will pop up with my ticket reply by Riot support.
https://image.ibb.co/dXkPae/Capture3.png
Zooming in Even if we take Action.. Bla bla bla, Nothing just uselessness.
However today i have placed again with that guy, and this was the last of it,
https://image.ibb.co/e48uae/Capture1.png
https://image.ibb.co/m4At1K/Capture2.png
Edit: for those who think i hate him or i wish him be banned forever or so on, as i said before if he took a 1 day ban that is enough for me, the point is that any punishment even if 1 hour will make me feel like some actions has taken back to that player.
However, i m out of serious i don't give a fuck about this case as i mentioned in my thread, some shit i heard that if im so sensitive etc need to find a new game, holy shit, guys i did this thread to show people what happened to me, Nothing more, Nothing less, So actually yeah, i don't give a fucks here.. GL ^^ BB