Viva River Cruises Helpdesk – Booking Assistance, Reservations, Customer Support, and Travel Information 1 8oo--837~44~6o or 1 8oo--4o6~84~95 If you have questions about your upcoming trip, Customer Care Support is available to assist with Cruise reservations, schedule changes, cancellations, baggage services, refund requests, travel documents, special travel needs, and general cruise information.