> Any advice for what I can do?
Email that author (email can usually be found via GitHub, or contact via other private way they've shared somewhere) and explain the situation, don't lambast them publicly on social media or similar ways. If that doesn't work, do the same but for another maintainer. Don't spam all of them straight up, wait a week or something before contacting someone else.
That would be inadvisable as the maintainer (?) in question's GitHub bio states:
> Emailing me about a temporary ban will result in a permanent one instead.
As far as I can tell the ban was given based on a single accidental ping to the maintainer, who then reviewed the draft PR before realizing it was not for the mainline llama.cpp repo.