The site owner of the project where the asset was uploaded, is the person who needs to reach out to support and ask them to delete the asset. If the file violates copyrights that you hold then you could always issue a DMCA takedown request. Feel free to use your favorite search engin for more info on that.
It’s a CV of mine, which is private information and it’s still publicly available online, the website owner is not responding anymore, they wrote me that took down the file a while ago and are not responsible for anything more, what should I do? what does it cost to use DMCA takedown request? can you help me with this? Any suggestions?