I’m guessing you are new to cruising? Cruise lines make changes all of the time, it might be a week before your cruise, gratuities go up, cabin cleanings twice a day go down to 1, shows are replaced, policies change, ports switch, prices go up and down - it’s all very fluid, trust me they have excellent legal teams and it’s all covered in your cruise contract. Websites take time to catch up. I think celebrity was being generous, I’ve seen websites offer some incredible deals in error, folks book and whatever was in error is cancelled by the cruise line.
Did you really think the ceo of a huge corporation was going to get back to you? Someone who was banned?