I bought a Cartier necklace on eBay 2 months ago and trusted that the necklace is authentic because the Seller seems reputable with 100% positive feedbacks and is also a jeweler with an actual storefront. However, after recently taking it into Cartier to request or an insurance valuation, they claimed that the necklace is fake. I contacted the Seller regarding this and had asked to return it for a full refund. He denies that the necklace is fake and refuses to call Cartier and speak to the managers to verify my information. Also, he will not allow a refund because it has already been over 2 months. I've already filed a chargeback dispute with my credit card company and am still waiting while the case is currently in investigation. I would like to know if anyone has experienced this and had gone through this process? What should I be expecting and is there anything else that I can do for the time being? Should I go ahead and send the necklace back anyways???? I don't know what to expect and it's driving me insane to sit here and wait. Can someone please share a similar experience or make any suggestions??? Thanks in advance.