Since you have not patented the design and have rendered it public, its too late for patenting it now. Some would say it is sad, but there is nothing you can do for stopping copycats from replicating your design, now.
On the other hand, using your pictures is a clearcut case of copyright infringement. You can probably get something out of it (at least force them to stop using your pictures), but I would not expect much from legal actions. Seek legal advice, and maybe consider small courts.
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