Originally Posted by
eoinnz
Well it appears Qantas are using this rule against you
----------
NOTE: For flights where First or Business Class is not offered or available, passengers may travel in a lower Class, in the applicable booking code for that lower Class. The fare for the highest Class used applies, without compensation.
----------
However it's now up to you to throw that rule back at them as it's very gray. I interpret that as when booking the ticket, if a particular flight doesn't offer a certain class, it's my own choice to accept a lower class. But it doesn't mention what happens if there is an aircraft change like what you had. The rule says "not offered or available" - well when you booked it obviously was offered and available and QF should really offer a part refund.
Exactly!
When booking a A/DONEx (or A/DGLOBnn etc.) one chooses whether or not to travel in a lower (or higher where applicable) class cabin at the time of booking.
For an airline to substitute equipment that does not support the cabin originally booked should be (and IMHO, is) completely different.