shocking policy conditions

I bought 8 return tickets for 18 February 2019 (return 22 February) from CA to Durban. My engagement is terminated and I asked to change the name of my previous fiancée to a lady friend. I have been told there is no way I can do this - I just loose the ticket money and have to book a new one?!! I have also booked a cruise from Durban - this was my present to my family for my 50th birthday ...there is no way that I can share a cabin with somebody who is not part of my life any longer. The MSC Musica charged me a penalty fee for change of name - I can live with that - but to loose a whole ticket?! That seems like **************** to me - how can I help that a 6 year relationship now suddenly ends.