My complain was that this app definitely have a lot of fake reviews, and my guess by being free they can generate a lot of downloads to keep it in top of the app store. And you can see a few of bad reviews, where some people actually purchased the app via in-app-purchases. And the name of my app brings traffic to the app store, and they use it in their advantage.
He called it false accusations. That they trust apple reviews, and that apple take it seriously. And a lot of well written text protecting themselves.
He was referring also to the head of legal department that they might take actions against me for false accusations.
Anyway, after that I just downloaded their apps and submitted concerns about legitimacy of their apps. That did not do anything.
I am surprised that those apps exist. Feel like they are 100% scam. My only guess is that somehow the people from review team know those developers and somehow let them to be on app store. Considering how hard sometimes to pass the review, that is the only explanation I have.