After the 3rd call to the US BA service center I was asked to submit documents at this URL. Just be sure to be logged in to your BA account first or all the information will be lost during the subsequent request to login. The rep said it should take no more than two days to process, but maybe 7 days. I'm happy I only had to wait on hold for about an hour. Crossed fangers.

ba.com/ecsupportingdocs