Join Date: Jun 2004
Location: SCL, MCT, LGW and a variety of 1W lounges in between.
Programs: BA Mucci (Seigneur et Ingenieur des Appareils Volants (Gold)), QF (WP and LTG), AA EXP, GF Gold
Posts: 3,931
GB or BA
Your flight was operated by GB Airways. I would copy the letter to them as well at their Gatwick Beehive address. PM me if you need more.
There is no compensation for being carried in the wrong class on AONEx! You probably got stuffed on the A no availability, D no availability therefore L situation. You should have checked that your "entitlement" to a Club seat was entered into your booking, whenever you get the wrong class on confirmation. However, I suspect it was slightly different. There is usually D availability on the Ibiza run.
Check the rest of your AONEx ticket now!
I wish you every luck with customer services. They are likely to be a lot more sympathetic to a BA EC member than other 1W holders. They get bugger all when BA stuffs up. Welcome to a global alliance!