Open a civil case in the court against the rock trading; the solution won't take more than 2 years with appeals included, but I don't think he may win or pay more as demages to the rock trading for the defamation.
As it stands now, if you are correct by the law, you may have 6 months for first verdict and tops 2 years for final decision after 2 appeals if you win the first one. If you don't open one, I am sorry to say but I don't see any way you are entitled to any claims.. And do not judge the italian authorities for being slow, they may be slow, but they do their jobs. In the case of crowdfundings of over 100k$ they do more checks than the pope.
Exactly.
However, there is a much simpler option. It would be enough to do a simple KYC......