I bought a Cath Kidston bag on Ebay but when I received it I felt it was a counterfeit as soon as I touched it. The oilcloth feels completely different to that of my other CK bags. They are smooth, this is textured. Also the leather on top of the handles is thinner than on my other bags where it is quite padded. I've emailed the seller but she says it's genuine and won't let me return it. What should I do next?