Being realistic, if your application was dated January 08 and was signed off/approved on 14th February 2008, you need to get KBC to confirm what date the application was received. It is highly unlikely it was after 11th February as I doubt any bank are that efficient
So if KBC are basing it on application date, and your application was received by them before 11th February 2008, your application was made before the flyer was withdrawn. I would argue you fall within the dates when the flyer was active and you applied on that basis.
I think this will be an example of the fringe cases KBC will deal with, given the dates involved. You need to determine what date KBC received the application
Carefully worded complaint to KBC asap, complete with copies of the forms signed by you and the 14th February date signed by IIB, and clearly state the flyer was active (as agreed by KBC at the Oireachtas committee - and include extracts from the transcript). You get one proper shot at this - make it count !