Those are the cheaper ones you can get from China, you can normally get them for $5. They probably just messed up the order, if you send them a message they should send you out the actual product. Chances are they won't ask you to return your current item so on the plus side you might end up with 2 stamps instead of one. On a side note did you end up using it? Let me know if it's any good.
Nah it's through amazon theyll want it returned. I bought another one from ebay and it shipped already. Not wasting time with amazon. They can refund me.