At least this may pierce through the thick google walls to the right person to do at least minimally required work to help you.
I had just submitted a DMCA complaint with their automated form a few days ago and with google being so big I can't imagine that getting anywhere.
I asked reddit.com/r/legaladvice if I had any ground to stand on by getting a lawyer involved and they pretty much just told me oh well there is nothing I can technically do. But I am not done looking into it
I think going with well-known firm (lawyers do know the difference between joe-blow-the-consultant and well known firms) albeit hiring them just to write a scary letter will invite a response from otherwise unavailable person at GOOG who will be more than happy to make this matter to go away.