Yeah, you just need to patient. I may take several weeks to get a reply. That a few persons have reported in this thread of very speedy replies from BA doen't mean that in general BA is this quick at responding - the saying "one swallow doesn't make a summer" still applies here.
For your information earlier this year it took BA 6 weeks to respond to my claim for reimbursement of costs incurred due to luggage delay - so you need to be very patient. Rest assured that you will get a reply eventually. No need to push/remind BA for a reply.
On a different note, I'm surprised that you were actually able to skip the first leg of your ticket without consequences apparently - no issues at check-in at LHR for BOS flight? The remaining flights were still there/in the reservation?