Who is the account administrator of that turnitin account. It must be associated with a university/college. Contact them and explain. If satisfied, they can request turnitin to remove this paper from their repository.

It is from another post
"Thank you for contacting the Turnitin Help Desk regarding your paper.
Please contact your instructor regarding paper deletion. For contractual
reasons all paper deletion requests must be submitted by the account
administrator."
Reference: https://essayscam.org/forum/gt/turnitin-deletion-paper-1053/

Thanks