I sold a purse and the buyer states that it looks different in color than my photo looked. The bag is khaki and green and stated that in both the title and the item description. When I mentioned this she stated that she didn't read either just looked at the photo and bought it thinking it was pink and black... She asked for an exchange which I don't have anything to exchange it with, so even though I specified no returns, I offered to refund her if she paid return postage and bag was in original condition. She responded by saying she hasn't decided what she wants to do yet. Can I give her a time limit to decide? My fear is that she may not have a smoke free environment or the bag might not be in same condition when/ if she returns it. Advice please? I'm pretty new to selling and not sure what to do. Thank you!