Report offending images via drop down menu “copyright” and choose images.

If you own copyright and a trademark, Amazon will remove offending images and issue a listing violation warning once you provide evidence of IP ownership.

You can also send the other seller an invoice for unauthorized use of your image (don’t count on the invoice been paid though).

Go on the offensive! Report them to Amazon for copyright theft. Usually Amazon will not even ask for proof of copyright ownership, as Amazon will automatically side with you to avoid getting drawn into the argument and tell the other seller it’s up to them to sort it out with you and (effectively) prove that they are not infringing.