To do that, you will file a claim in Miami which will require lots of additional traveling to the court house. in the guest ticket contract that you agree to when you booked the cruise:
(d) Any and all disputes, claims, or controversies whatsoever, other than for personal injury, illness or death of a Guest (whether brought in personam or in rem or based on contract, tort, statutory, constitutional or other legal rights, including but not limited to alleged violation of civil rights, discrimination, consumer or privacy laws, or for any losses, damages or expenses, relating to or in any way arising out of or connected with this Contract, the booking of the cruise, including but not limited to the booking of Carnival Vacation Protection products, shore excursions, and land and hotel packages, or Guest’s cruise, no matter how described, pleaded or styled, between the Guest and Carnival) in which Guest or any other claimant asserts damages for less than $8,000 (excluding attorney fees, costs, and interest, which are not included to determine the amount at issue) must be litigated if at all before a small claims court located in Miami-Dade County, Florida, U.S.A. to the exclusion of the courts of any other county, state or country. Guest hereby consents to such exclusive jurisdiction and waives any jurisdictional, venue or other objection that may be otherwise available.
contract: https://www.carnival.com/about-carnival/legal-notice?icid=CC_Footer_83