How to delete a League of Legends account?
The description of the service:
League of Legends is a multiplayer online battle arena video game developed and published by Riot Games for Microsoft Windows and OS X. The game follows a freemium model and is supported by microtransactions, and was inspired by the Warcraft III: The Frozen Throne mod, Defense of the Ancients.
Accounts may be disabled, but some data will be retained. E-mail firstname.lastname@example.org with the subject "Account Deactivation" and include your username, summoner name, server and email used when registering the account in your ticket