I need some advice. I am relatively new to eBay and I just bought a fake MJ bag. I received the bag and discovered that the inside is pleather (among other issues)! The seller has a 7-day return policy which is good, so does that mean that she would just take the bag back no questions asked? She also said "I guarantee it 100% authentic, otherwise I will return your money." Should I just contact her and say "Hey, I need to return the bag because it's fake." Do I need to contact eBay and file a claim of some sort? Or should I contact my credit card company to dispute the payment? I am not sure what I should do next, and I don't want to get into a big fight over this. Any advice on what to do would be really helpful...TIA.