TikTok Impersonation Error: Account Using My Identity

I am writing regarding the TikTok account with the username “nishinish***”. My identity is being used without my permission through this ID, even though my password has not been shared or accessed. I have already tried to contact TikTok support/Huu about this situation, but the problem has not been resolved. I want my identity to be protected and this unauthorized use of my ID to be stopped. I kindly request that my account and identity information be checked, any unauthorized or fake use related to the username “nishinish***” be investigated, and my original account access and security be recovered and ensured as soon as possible.