Thanks UKtravelbear but 2 CS persons blew me off with the same excuse: "The flight change was made more than 14 days prior to the travel day."
I have an email from the travel agency confirming the original flight numbers just one day before the flight and BA has provided nothing in writing to the contrary besides their unsupported statement to that effect.
BTW, just to give your suggestion a chance, I called BA customer service and their brief hours now end at 3:00 PM EDT! Not that you could get through to a human previously but now it is just laughable.
No, I'll sue and see how that plays out and report back. Here is an article from the Washington Post on June 27, 2013 titled, "Small Claims Court: A better bet for stiffed airline travelers?"
http://goo.gl/K0a3i2