I would call AmEx customer service and discuss the situation with them.
Our situation was a little different. My wife had purchased a ring that needed to be sized and didn't get delivered to the ship as promised. We never had possession of the item.
All I ask is a tall ship and a star to steer her by; John Masefield
Carnival: Glory 2004, Destiny 2008, Splendor 2009, Freedom 2011, Valor 2012, Dream 2013
Celebrity: Summit 2011
Princess: Ruby 2010, 2014, Caribbean 2013, Coral 2014, Regal 2014
Star Clippers: Royal Clipper 2015