I have joined Cruise Critic this morning as I think my mother finds herself in exactly the situation that is presented in the OP.
My mother is due to fly out to the Britannica on Saturday. She completed the health declaration late last night and was honest when replying to the question listing the many symptoms, as she has had a cough in the last ten days (but she has continually tested negative for Covid). Her booking was immediately cancelled and understandably she is very upset.
I am here to ask what immediate steps she can do to get the best outcome? Either in terms of still going on the cruise, or if not that, in ensuring that she gets her money back or a rescheduled cruise.
Thank you in advance.