I sold an item and the buyer asked to return it. It wasn't faulty so I asked her to pay postage costs to return it. She didn't want to and continued to argue with me. I got so fed up I refused the return and she has now left me awful feedback. Iv been selling and buying on ebay for years and never had this before. Iv sent eBay an email but I'm so stressed out over it. Where would I stand with this?