Amazon deliberately obscures that. They can't have it both ways; they present these sellers as part of their store, so they should take responsibility for the goods they sell.

Even buying from Amazon itself is no guarantee because they commingle inventory. The OP should totally escalate to Amazon customer service for a full refund on a fraudulent product, but you get the feeling Amazon is fully aware of the situation and profiting from it, and treats the occasional refund as a cost of doing business.