This bag is totally authentic and is made of the very popular SAFFIANO LEATHER. Saffiano is different than regular leather as it is treated and made to be water and stain resistant. I agree with you about the smell of it and I don't care for it at all. However, it is all the rage these days and VERY popular , although much like you, I don't care for it either. I much prefer my soft leather bags.
Don't take it out on the seller though, because the bag is totally authentic. You just don't care for SAFFIANO leather, but the bag is as described.and the seller gave you a good deal on an authentic bag. Just tell them you never had saffiano before and you really don't care for it and would like to do a return. They won't have any trouble reselling it, because believe it or not, this saffiano is really hot right now! lol!
Next time you buy a Michael Kors, just stay away from any bags that are made of saffiano. They really do have some beautiful regular leather bags. Check out the Riley perhaps. It is gorgeous and has the zipper top, but is NOT made of saffiano. It is a beautiful pebbled leather. Good Luck!
PS., Coming here would not help you do a return. If you ever get stuck with a fake, you must go to a paid professional or PayPal won't accept it as a valid authentication. There are not many that evaluate Michael Kors bags, but I heard '*****************.com, is a good one.