Age verification

I accidentally confirmed my age as 16-17 which made tiktok think I'm under 18, how can I revert this? I was trying to change my age originally as my friend shared me posts and I couldn't view them because I was "age restricted" talked to the tiktok AI, it sent me a website. I chose the age verification of using my face, did that. It thought I was 16-17 tried to back out and it auto confirmed my age and won't let me re-do. Any support please?