I ran some checks and found nothing for Andrea Medri. There is only one "Davide Barbieri" in the whole of the UK companies list, he has a mailing address in London but himself is Italian and born in 1974. The company is called "DAVIDE BARBIERI LIMITED"
Those websites listed above are scamming using Rock Trading owners name. It is quite clear Rock Trading and its owners have nothing to do with the scam websites listed but it is also true that they are selective scamming their customers including the OP.