Hello,
So firstly, you’ll need to contact Riot support (which I will provide a link to). The developers/employees here would also instruct you to contact Riot support. Secondly, Vanguard can sometimes ban an individual when it detects a cheat engine for another game. Even if it’s not for Valorant it could trigger it and result in a ban. Support can further clarify the reasoning. I would do thorough check of 3rd party applications you use and check to see if they are prohibited by Riot and if you have any other cheat/cheat engine designed for other games then I would uninstall them.