Remove Someone Repository That Cloned From My Repository

Hi, I was accidently made my repository to public, and someone cloned my repository, he has no public contact. This user just spamming, cloning many repositories, one of them is my repository, actually it’s private just for my company. It doesn’t have a copyright, but it contains many sensitive information. It’s really built by me, inside there is my company logo.
How to remove the repository? I’ve submitted a request and got ticket number, but still has no response. Until now I have a headache.