You say the buyer emailed you and sent a photo. Was this through the eBay Message system? eBay can only look at messages within its own system, and won't take other emails into consideration.
If it were me, I would phone eBay ((get phone number and a one-time pass code through links in Help & Contact) during weekday business hours. Hopefully you will get through to the US call centre in Utah, where there are sometimes employees who are better trained than the offshore call centre. Have all the details in front off you, note the timing of her complaints, etc. Stress the 2 different types of complaints. Know how many days passed from when you show delivery confirmation to when she opened the item not received case. Note the time between eBay deciding in your favour, and her opening another case for not as Described (again, # of days between when received and when the complaint was made). Note the rants and insults. Get a case number for reference. Make notes. If you think the rep is not understanding, or not helpful, call back to get someone else.
Make sure you have a lot of time for the call, an empty bladder, and a land line so you don't use up your cell phone minutes if that applies.
I would not rely on eBay ruling in your favour without talking to a good CS rep - cases are handled automatically, and extra information is not taken into account by the system. Only a human can judge this and help you.
Good luck.
