Please do not cruise with Expedia - they don’t have the authority to helo you

What a pathetic lot! I booked a cruise through them. My email address change but they can’t change it so I can’t get notifications. Their virtual assistant and customer service say they don’t have authority to work on Cruises! I’ve decided to cancel as my deposit was deducted but now I can’t get help. I can’t cancel because you can’t do it on the app or online an nobody has authority to change an email or cancel a cruise.