Doughboy

I have a situation.  We booked an Alaskan Cruise for Aug 28th.  Paid $500 deposit May 30 we must pay the rest of the fee.  Now I hear Canada is not allowing ships to dock at their port until Oct 31.  This is  no brainer that this cruise will be cancelled.  I see Royal Caribbean is making a big announcement June 3rd. I sure to announce all Alaskan Cruises will be cancelled for 2020. What should I do.  We really don't want the $500 cruise credit as I think future cruises will all go belly up in the near future.  How can I get our $500 back and call it  quits.