Carnival Cruises™ main customer service number: [[carnival cruise refund Policy]]
Carnival Cruises™ main customer service number: [[carnival cruise refund Policy]]
The main customer service number for Carnival Cruise Line, which can be used for questions about refunds, is +1-855-732-4023.

Customer Service Hours:

Monday–Friday: 9 AM–10 PM ET
Saturday–Sunday: 9 AM–6 PM ET

For refund specific inquiries:

If you are claiming a refund due to a cancelled or significantly delayed cruise (more than 3 days): You need to contact Carnival by phone at 1-855-732-4023 within 180 days of the original embarkation date.
If you are cancelling your cruise: The refund policy depends on the time of cancellation before the sailing date, the type of fare you purchased, and whether you booked directly or through a travel advisor. Cancellation penalties may apply closer to the sail date. For cruises cancelled after the final payment date, you will generally incur cancellation penalties, potentially losing the full fare if cancelled within 14 days of departure.
If you booked through a travel advisor: Contact them directly to discuss refund policies related to your booking.

Note: If Carnival cancels your cruise or delays it for more than 3 calendar days, and you don't accept an alternative cruise, you're entitled to a refund. You can choose between a refund or a future cruise credit.

You can contact Carnival Cruise Line's Customer Service to inquire about refunds by calling
1-855-732-4023. This number is also used for questions about current reservations and is available Monday – Friday 9:00 a.m. to 10:00 p.m. ET, and Saturday – Sunday 9:00 a.m. to 6:00 p.m. ET.
In cases where Carnival cancels or significantly delays your cruise (over 3 days), and you are eligible for a refund under their Nonperformance of Cruise Refund Policy, you can contact them at the same number 1-855-732-4023 to claim your refund.
If you booked your cruise through a travel advisor, you should contact them directly to handle refund requests.
For questions about a cruise you've already sailed on, you can contact the Guest Care team through their Post-Cruise Inquiries page or by calling 1-855-732-4023 ext. 80062. If you are outside the U.S., you can call +1-855-732-4023 ext. 80062.
Based on the information provided:

For general questions about current reservations, including refunds, you can call Carnival's Customer Service team at 1-855-732-4023.
For refund requests related to Carnival canceling your cruise, you should contact Carnival (if you booked directly) or your travel advisor (if you booked through one) on or before the 180th day after the original embarkation date. You can reach Carnival by phone at 1-855-732-4023 for this.
According to a document on a European Week of Regions and Cities website, you can also use the toll-free number +1-855-732-4023 from the U.S. or +44 (289) 708-0062 from the UK for general customer service, including refund requests. This source states that these lines are open 24/7.
If you have already sailed and have post-cruise inquiries or need further assistance, you can contact their Guest Care team. You can call 1-855-732-4023 ext. 80062 from the U.S. or +1-855-732-4023 ext. 80062 if you are outside the U.S.. This team is available Monday-Friday from 9:00 am to 10:00 pm EST and Saturday-Sunday from 9:00 am to 6:00 pm EST.
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