This is the wrong section to report players. If you want to report somebody please do it here:
https://www.cubecraft.net/forums/report-a-player.24/ Next time you may use these guidelines to help you in your next report. That can be found here:
https://www.cubecraft.net/threads/player-reporting-guidelines-and-formating.136047/
When you are recording somebody hacking, you must use
Video evidence of the player breaking the rules.
Screenshots are not valid evidence to someone that's hacking.
Some recording softwares you may use are stated below:
After you record, you may upload your video evidence to a video hosting website. (eg: YouTube)
I'm sorry to say but this player will not be banned. You would need video evidence in order for him/her to get banned.