866-227-1888 is the number I always end up using when I need Carnival support. A few weeks ago, I had a weird charge pop up in my booking summary, and instead of digging through FAQs, I just called. The rep was super patient and walked me through what happened—it was just an automatic gratuity adjustment. What surprised me was how quickly things were sorted out. I’ve tried using chat before, but they took forever to respond. Calling felt more personal, and I could actually explain my situation without typing paragraphs. If you’re stuck or something looks off in your reservation, just call. I used it early morning and had almost no wait, so timing helps too. It’s become my default support line for anything Carnival-related.