I have to say, I really prefer the way eBay handles disputes, where the information submitted by both parties is view able within the case.
I have an authentic item under review because the buying is claiming it is not, and I have no way of finding out what photos and information she submitted. I emailed in my own photos and links to similar bags from the same line for comparison, but I wish I had the option of paying for a professional authentication and submitting it. There also doesn't seem to be a set time line for a case review and I don't especially like not knowing how long this will take.
The same thing happened to me. It was buyers remorse but that isn't an allowed reason for return. They didn't keep me updated at all. After two weeks the funds just showed up. They didn't even notify me that it was resolved in my favor.