Hi Frequent Flyers . I have a problem . I booked a RTW, which was paid for in full in April , However I did change some flight dates, No problems there , until I checked my itinerary Mel -chc BA 7355 : Says ( Flight does not operate please contact airline.) , then too my surprise I cannot get back from chc-mel as this takes me over my 20 segments . I do apologise in advance if this is confusing , but any help will be gratefully received before I attempt to sort it out with BA in Cai Kind regards ELO