Mucisoft
Profile > "Delete my account" > confirm.
Email mucisoft@gmail.com with the Google/Apple email you signed in with and, if you know it, your player code, and write "Delete my account"; your account will be deleted within 30 days.
Your account and all game data: gold, trophies, cards, friendships, blocks and notification tokens.
Report records may be kept for up to 1 year for security purposes.