https://i.gyazo.com/8af4d68bd92a3440c50009a8311c5eed.png
So after I finished my game I got a message that I was banned? I clicked ok and it went away and nothing happened. I can access everything and I turned my computer on and off and restarted the client and I can still log on.
Edit: Also theres no email, I think it's just a glitch?
Weird. Give it a few and then check again? Have you been toxic / ever punished before?
It might be a charge back? Try contacting support, they'll unban, once you can pay for whatever it is that you may have purchased. If that is indeed the case.
EDIT: https://support.riotgames.com/hc/en-us/articles/201898070-My-Account-is-Suspended Under the Financial and Security sections.
This might be of some help as to understanding what is going on.
Relog back into the client and see what it says.
When you login, what year does it say you are permabanned till?
