We had the same on Iona in may, got the same sorry pathetic message, so emailed Sture the Carnival CEO, his executive office again tried the sorry message but I gave them the facts like you quote, I got the difference between select and Saver fares as obc. The same has just happended on Azura so am waiting for even higher levels of compensation this time. It will also be my last P and ao cruise, they simply dont respect their customers