According to the government website: Barbados.usembassy.gov
The Embassy of the United States of America in Barbados has transitioned to a new appointment and document delivery service for the non-immigrant visa section. Implemented at U.S. Embassies worldwide, the new process is designed to be more convenient and user-friendly. In addition to the new online system, Call Center representatives will substantially expand available hours for applicants to obtain information by phone. Important Note: When appearing for the appointment, all applicants must bring both the confirmation page for their online application and a copy of their receipt. Applicants will no longer be admitted on the premises without these documents.
Effective March 21, 2013, applicants can book a new appointment online or by phone.
Call center representatives are available: Monday-Friday, 7:00am-9:00pm (local time)
Call Center representatives can be contacted at:
Barbados: 246-620-3399
United States: 703-439-2357
As found on the CSC Barbados website: http://usvisa-info.com/en-BB/selfservice/ss_country_welcome