this is funny (or not)
Namecheap never reacted to the ticket. GitHub seamed to have taken down the repository for some days. But now its up and running again.

I think that for some people holidays have started a little earlier, at this time of year support may be slower than usual. Have you followed Namecheap rules regarding the abuse reporting? Maybe they consider your case as
Fraud scheme and they will not assist you if report is not made to
https://complaint.ic3.gov .
I have to admit it's strange that GitHub is reacted in that way, maybe they remove them, but they find a way to get back. Only thing we can do is to report them again.
yes probably - it would be a mess if another person would become victim of this fraud
Is there any progress in the investigation of your case?
yes there is - I will post the progress when it will not affect the investigation anymore