Carnival Cruise Lines Sold Cuba cruise, but didn't sell ability to get off of the boat Tampa FL

Booked a Carnival Cruise to Cuba on 4/8/18 with an 8/9/18 sailing date. Was subsequently told that in order to actually get off of the boat and see Cuba that we would have to be part of an "excursion". Excursions listed were expensive and smelled like a tourist trap.

But worse, the only excursion that coincided with the ship's sailing time was completely booked. When I called Customer Service to complain i was told to simply "get on the boat and maybe something will change". I told them this was nonsense, that Cuba was the only stop on the four day cruise, and why would I go if i could not see the country.

Carnival's answer was that they guarantee the arrival in a Cuban port, they don't guarantee that you will be able to actually get off of the ship. Now, when I told them I wanted to cancel, they said that's fine but I will lose my $300 deposit. This is truly nothing other than blatantly criminal behavior.