A schedule change is easier to explain when the itinerary is split into what the travel site shows and what the airline shows. I’d keep both confirmation numbers, flight date, route, airline notice, ticket status, and the exact wording from the booking page. Keeping justfly phone number as the contact reference, ask which record controls the update rather than blaming either side. A short comparison of the two confirmations is better than retelling the whole trip plan. Save the airline notice until the answer is clear.