I waited and nothing happened. Emailed their support and it wasn't that helpful. They said try another card. Well, that's the card I use that is compatible. Option two was the following.
Note: Performing the below steps will delete all the cards and the card details in Samsung Pay Application and you can re-add them after installing the application.
Open Apps > Settings > Applications > Application manager > Samsung Pay Framework
Touch FORCE STOP, then CLEAR CACHE, then MANAGE STORAGE
Touch UNINSTALL UPDATES
Press the Home key and open Apps > Samsung Pay, then touch INSTALL
Tried that, re-verified card, five hours later nothing.
So I'm stuck and can't use it. Awaiting further instructions from their so support.
Not impressed so far. This seems like it should be seamless but it's not, it's not a good experience.