Is there a way of getting the exact fare breakdown from a ticket number? I know that when you search a fare on ITA Matrix you can see the amounts for base, taxes, fees etc. I’d like to see this data but for a ticket I am trying to refund. BA say they can’t give it to me and only summarize that the “ticket cost was £523.87 per person (£187.00 fare plus £336.87 in taxes)”.

can any website or other tool be more comprehensive?