Update: Last night, eBay closed my case...and ruled in the seller's favor. I was so frustrated by the whole thing that I decided to wait until this morning before calling eBay, so I could be more level-headed and have a clear mind when I spoke to someone. So first thing this morning, I called eBay and spoke with a very nice male rep. I told him my case number, explained what was going, and mentioned the returns link that
LVoeshopping posted in this thread. He put me on hold for a few minutes so that he could look at the seller's listing and review the case. A couple minutes later, he came back and told me that he had reversed the decision, and stated that eBay should not have ruled the way they did the first time. Due to that, he said eBay would be the one issuing me a refund. It didn't take long at all either; the money is already back in my PP account. The only thing that I find unfair is that the seller still gets to keep her money, going off how he explained it to me. I don't think eBay should have to eat this. The seller should be the one who eats it IMO, because she was being deceitful by offering an open return policy in her auction then being unwilling to accept a return. I'm happy that things ended up working out for me, but I just wish it was the seller who got the short end of the stick because I feel like she deserves it. If eBay keeps eating the cost for issues that were sellers' mistakes, that isn't really teaching these sellers anything.
My question now is this: If I do leave the seller negative feedback, how would that affect her "Top Seller Rating?" I hate feeling like a jerk for doing what most of you all say is the right thing to do (leave neg feedback), but that's just how I am. I find it hard to be mean to anyone even if they have been to me. But at the same time, I don't want this seller to try and walk all over anyone else...not all eBayers are as knowledgeable or have a great group of ladies like you all on here to help them.
Thanks so much to everyone who posted...it was a big help!