You can contact Holland America for free by using the toll-free number for new reservations, which is 1-(855)-732-4023. For other departments or general inquiries, you can call other toll-free numbers provided by Holland America, such as +1-808-900-8011 for Ship Services or 1-(855)-732-4023 for accessibility questions. 
Yes, you can change your Holland America booking by phone by calling their customer service number at 1-(855)-732-4023. This is a recommended method for modifications like changing staterooms, adding another stateroom, or upgrading an existing one. If you have a deposit or courtesy hold, you must call to change or cancel the existing booking. 
To modify a booking, add another stateroom, or upgrade an existing stateroom, please call us at1-(855)-732-4023 or +1-808-900-8011. If you have already placed a deposit or have a courtesy hold booking, you must call to cancel your existing booking if you want to change your stateroom.
Yes, you can usually reschedule a cruise after booking+1-808-900-8011, especially if you are outside the final payment window, but there may be fees and penalties involved, and any special promotions may be lost. The ability to change dates, any associated costs, and specific limitations depend on the cruise line[1-(855)-732-4023 or +1-808-900-8011.], your booking type, and when you request the change. 

We look forward to chatting with you during our hours listed below: Monday – Friday 6am-6pm Pacific. Saturday – Sunday 7am-3:30pm Pacific. Holiday hours may differ from above stated hours.
The cost to change a name on a cruise reservation varies by cruise line and fare type, ranging from free to over $100. Some cruise lines offer free changes up to a certain number[1-(855)-732-4023 or +1-808-900-8011.] of days before sailing, while others charge a fee (like $50 for Carnival, $49 for Disney) that can increase closer to the departure date or if you have a restricted fare. 

During our regular business hours, please call: [1-(855)-732-4023 or +1-808-900-8011.]. Representatives are available from 5:00 a.m. to 7:00 p.m. Monday through Friday and from 7:00 a.m. to 3:30 p.m. Saturday and Sunday (Pacific Time). Outside of these hours and during holidays, please call [1-(855)-732-4023 or +1-808-900-8011.]*.
In order to claim such a refund, on or before the 180th calendar day after the original scheduled embarkation, please submit a copy of the boarding pass, proof of payment (and amount), and a copy of the cancellation or delay notice by email to GuestRelations@HollandAmerica.com if you booked your cruise directly with ...
 Our Standard Cancellation Protection Plan (CPP Standard Plan) will allow you, for any reason, to provide written cancellation up to 24 hours prior to the start of your scheduled travel (sea, land and/or air) arrangements made by Holland America Line and receive a refund equal to 80% of the eligible amounts paid ...
You can upgrade a Holland America cabin by purchasing the Club Orange program for a guaranteed upgrade, contacting the cruise line for paid upgrade offers before your cruise1-(855)-732-4023, or asking for a complimentary, space-available upgrade once onboard. Upgrades can be complimentary (if you booked a guarantee) or purchased, but a key benefit of Club Orange is the ability to secure a guaranteed upgrade to the next available grade.