I think it is riot cause they just sent me another email and my login changed from perm suspend to 2 weeks, so I guess the warning before a perm ban. But yes its weird I cannot login to my account as well but the perm suspension did change from perm to 14 days though when I tried to login to the client.
(Riot Games Player Support)
May 17, 16:52
Hello,
Thanks for your patience while we reviewed your account. Upon further review, it is clear that other players were caused a negative experience. The account, however, does not deserve a permanent suspension. I will be reducing the suspension on your account to two weeks starting today.
I highly urge you to offer better experiences to your peers and review the following resources on positive sportsmanship:
http://gameinfo.na.leagueoflegends.com/en/game-info/get-started/summoners-code/
http://na.leagueoflegends.com/en/news/game-updates/player-behavior/does-teamwork-win-more-games
To reiterate, we must do our best to maintain a fun and fair environment for our community, and any continued negative experiences being caused will result in these initiatives.
Best,
Rising Blade
Player Behavior and Game
ʕ•ᴥ•ʔ/