Getting rid of old account

When musically was popular in 2015, i had an account that i made through the ‘Sign up with facebook’ option. I was really young and eventually deleted my facebook account, and now I have no clue how to get into the account to delete it. I was 10 years old and the username is literally just my full name, so i want it gone for privacy reasons (as well as those videos not showing up on background checks). No way to contact tiktok support, what do I do?