I Need TikTok to Update the Email on My Old Account

I am using TikTok on an iPhone and I am writing because I can no longer access my old TikTok account with the username “zziea_1”. I forgot both the password and the Gmail address linked to this account, so I am completely locked out and cannot use any of the normal recovery options. My request is for you to help me recover access to this old account and change the Gmail address associated with it to a new one that I can use. I last had access to this account about three years ago, and since then I have been unable to log in. I have already tried to get support through your help channels, but nothing has happened and my problem remains unresolved. I kindly ask you to review my case, verify that I am the owner of the account with the username “zziea_1” through any additional security checks you require, and help me regain access and update the Gmail address so I can use my account again.