Thank you for providing so many clear photos. I have been consulting with other, much more experienced, Prada authenticators on this one. And our thoughts are all the same...there is something very strange about this bag, the listing and the cards. As far as we can recollect, this red camo was only fairly recently released and various hallmarks on the bag confirm our thoughts about this. However, those cards absolutely DID NOT come with this bag originally, unless it is a fake. The fakes of all the nylons are extremely good and it is almost impossible to make any assessment just from the photos. Usually, it's the quality of the fabric which is noticeably different, and of course, that doesn't show in photos.
My gut feeling is that the bag is a recent, excellent copy. You may wish to engage another authentication service which, for a fee, will provide you with a letter of authenticity, or non authenticity, which you can then use, if necessary, to pursue a claim through ebay's usual procedures.
Sorry I can't be more helpful, or bring you better news, on this one.