Today I received such a letter from Google, more precisely 55 e-mails

with a hundred URLs each. Initiator - MG Premium Ltd is brazzers, pornhub, adultforce and co.?
The following is interesting - complaints arrived at text reviews with screenshots, and NOT THEIR sites. It seems that a stupid divorce or tricks of competitors. There are about 400 different sites in a full complaint.
Does anyone have experience of getting out of such sanctions?
Does anyone have a working contact from this - MG Premium Ltd ?
any advice - welcome to the topic