Unlink The Unknown Email From My Valorant Riot Log In Email

I have been experiencing a serious problem with my Valorant / Riot account for about 5–6 months. My Riot account email appears to be linked with an unknown email address that does not belong to me and to which I have no access. Because of this, whenever I try to log in to the Riot account management page or change my in‑game name, the system asks for a verification code that is sent to this unknown linked email. Since I cannot access that email, I am completely stuck and unable to manage or secure my account, and I strongly suspect that my account has been hacked or taken over. I previously tried to contact Riot Games support about this issue, but I did not receive any solution and the situation is still ongoing in the same way. I am very concerned about the security of my account and any possible misuse. I kindly request that the unknown email address linked to my Riot account be unlinked, that my account be secured, and that I be given the possibility to fully access and manage my account again via my own correct email address. I would like this to be investigated urgently and resolved as soon as possible.