Escalate to BofA. they have a liaison for RTR and can help to get an agreement between the 2.
***Need Help? Try this:
For tweets please do not place LN# or borrower name in the message. Just a brief: 'Need help with a HAFA short sale" will suffice. Make sure to mention short sale. Also, each file should to be a separate tweet. If you have issues with 4 files then send 4 tweets. They will respond very quickly.