Ban from clash

Hello. How to ban some one from Clash Royal. Dome player come to Another Clan play, and leave, before that post on Group very bad comment, about that person who he play. Something about corona virus, I wish your mother died on coronovirus. His nick Lauter Kimmo. He is a lider of Clan Skill is Magic.
Please where to go, for who to speak about.

You can report to player support. Remember to include their player tag, your clan tag, and your own player tag for easier resolution.