In article ,
Hilary wrote:

To what extent is it permitted for an airline company to sell "first
class discounted" tickets to passengers that will eventually travel in
economy class or enhanced economy ?

If they knew they were withdrawing the service and continued selling the
tickets at the higher fare, then than would probably count as some sort of
fraud.

I doubt this is what happened. Air France has not had first class
service to the Caribbean for quite some time.

If you bought your ticket a number of months before travel and
afterwards they withdrew that class, that's a different matter.
Unfortunate though. Contact the airline and ask for the difference
between First and Club class to be refunded.

Except that he bought neither a First-, nor a Club-class ticket.
He bought a ticket in premium economy, for which the fare code happens
to start with A (presumably, for ``Alize''). I don't think the airline
would refund any money.