Please report the player here http://forum.pokefind.co/index.php?categories/punishment-appeals-and-player-reports.21/
Unless you have actual footage of hacking, then this is not enough evidence. I have killed 3 people in a matter of 15 seconds before without hacks.
You needed to report it in discord at #punishment-appeal (If I spell it correctly) or report at http://forum.pokefind.co/index.php?forums/punishment-appeals.22/