How do I get a copy of a version of an addon that is no longer listed?

I hope this makes sense. If a developer has rolled back to a previous version, how can I get access to the version that was rolled back from? I am suspicious of an addon behaving maliciously (I’m talking serious financial theft), and when I posted a negative review about it, the developer promptly rolled back to an older version. I want the version that I was concerned about so I, or someone else, can check it over.

Old versions remain but are not visible to the public. If you submit an abuse report, the reviewer can check it. No way to get a hidden version.

Thanks. It’s now been removed from the add on site, but does that mean it has been reviewed and found to be malicious? I need to find out for sure if it responsible for the crime. Who do I need to contact?