League of Legends Permanently Banned My Account Without Reason

My League of Legends account, which I have used for 9 years, has been permanently banned even though I have never used cheats. Up until a week ago, I was playing without any issues, and I never received any warnings or penalties before this sudden ban.

If Riot Games reviews my recent match history, it will be clear that I was not cheating. This ban is unfair, and I deserve a proper explanation and resolution.

Riot Games, please review my account immediately! I have spent years of effort and time on this account, and I will not accept an unjust ban without proof. Fix this mistake and restore my account now!