La Cantina (the CS), though, is not the same restaurant as La Hacienda. Although they're operated by the same company, they're separate entities sharing the same building.
What are you calling for? To make a reservation or to ask questions? I never call WDW-DINE to ask questions, they're really only good for making reservations. And if you can get online, it's much easier to make reservations at www.disneyworld.com/restaurants.