Ok, but lets play devils advocate here. When KBC pulled the flier, how did they do this? Did they simply not issue any more or did they circulate a notice to all brokers that the contents of the flier was no longer valid? Did they alert brokers to the withdrawl of the flier? If they did, then the onus is on the broker to alert the customer accordingly? I don't know the answer, but since they have very specific dates, I would imagine there was some sort of communication they can reference here.
Meeting with a broker and them telling you something does not constitute an offer from KBC. Was the formal application made in April with the same broker? Does the broker have any written communication around discussing the flier?
If I go into a shop today to ask about something and have a conversation around it and leave. Then if I go back 2 months later, what is my expectations around the initial discussion? Things change, and particularly in early-mid 2008 around banking side. The wheels were coming off the wagon at that stage and Bear Stearns etc had just been bailed out.
But of course, I have no idea what your home loan agreement says - I am guessing it would be ambiguios at best.
By all means, put your case together, but I am guessing you will have a very tough fight on your hands. Its very easy for Michael McGrath to ask about this, but this is no guarantee it will be considered by KBC.