wats the point of blockin a member on here, cant they make a new account?

well i purchased some brandnew foglight covers of him for $190 and its been more than a month ago, and i still havnt recieved them, hes not answering my calls or my messages, he abused me, i said would get the police involved, and he said good luck getting the money.

why can pl do this, if i lived over there things would be different, id go to his house. if i had mates over there id get them to go see him