Glad you got it sorted, and that their system accepted your card and charged you the lower rate. It's quite temperamental and erratic. When I tried to book a flight a few months back it refused to accept ANY of the debit cards that I offered it, and I had to use a credit card in the end. I contacted Ryanair about this (clearly a bug, as there was nothing wrong with those debit cards, and I had used two of them with Ryanair before). They thanked me for my observation but refused to refund the difference. Just what one would expect, of course...