I have a buyer who keeps sending me emails demanding that I contact. I have several times. I do not get a message that emails are undeliverable. I have tried through my hotmail, a different server and ebay. I think she is getting the emails. Can I ask ebay to try or do I have to call Atlanta? The only contact information is her phone number - an address would be nice, I could send a registered letter. How can I avoid getting a negative?