Yes I did open a dispute through paypal, but i fear that i may have shot myself in the foot due to choosing the "report unauthorised access my account" option instead of "i received an item that wasn't as described" option. Before you ask, I opened it, enraged, after initially finding out that I had wasted £50 on what is essentially a "knock off Picasso".
I have recently sent an eail enquiring about how to report an artist to the sites owners and i'm currently waiting on their reply.