Now I understand why you always seemed to comment on the scam allegation here with much surety and confidence.
As you are an Italian resident that knows various aspects of law, what is the best advice you would give to both the OP and Rock Trading to settle this issue as soon as possible?
I live in Italy (Toscana and Sicily) and Malta since I was in the 4th grade (more than 12 years) and I have my master degree in economist which is more like an accountant.
Now I do only AML on crypto basis and situations like the OP's, you find at any corner.
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.
If he is right and he wins, penal may follow for the rock trading.