When a publisher refuses to remove a negative post, you aren't out of options....

https://medium.com/@raseisatvd/how-to-find-a-trustworthy-reputation-management-service-the-no-nonsense-guide-3770756186c0

When a publisher refuses to remove a negative post, you aren't out of options. You can still take control of your search presence by leveraging Google’s Remove Outdated Content tool to scrub broken links or cached snippets