When my group of friends and I needed to make a couple of adjustments on our return flights out of Bali, we opted to go see the British Airways Bali Office person instead of trying to cope with online forms. It was the best thing we did on our trip. Since the moment we entered, we were warmly received and sent to a customer service representative who assisted us promptly. The employee—Wayan, I believe—was very professional and clearly seemed to be thrilled to assist.