HOUSTON (Reuters) - Unpaid debts and broken promises are making Venezuelan oil giant PDVSA an outcast in several Caribbean countries where it had been a guest of honor.

The logo of the Venezuelan state oil company PDVSA is seen at a gas station in Caracas, Venezuela on June 30, 2016. REUTERS/Carlos Garcia Rawlins/File Photo

The state-run company’s crumbling finances are causing operational disruptions across one of its most essential regions, according to internal company documents, six sources with knowledge of its operations, and Thomson Reuters vessel-tracking data.

Business partners in the island nations of Curacao, Bonaire, Jamaica and the Bahamas are turning away from the firm as debts pile up to tugboat operators, ship brokers, maritime agencies and terminal owners, the sources and documents show.

The company’s problems include blocked loading operationsof delinquent debts, according to two people with direct knowledge of the matter. PDVSA had allegedly failed to pay the unit, Saybolt, several million dollars for months of oil testing services.

Mark Elvig, general counsel for Core Laboratories, declined to comment.

REVERSAL OF FORTUNE

The problems reflect a stark reversal for a company that has been a trusted partner of governments in the Caribbean.

About a decade ago, Caribbean countries laid out red carpets for PDVSA executives, who came offering cheap oil under the Petrocaribe program that leftist President Hugo Chavez launched to win allies as a bulwark against Washington.

Petrocaribe worked well for years, as poor islands curbed the impacts of rising global oil prices and Venezuela bartered oil for everything from medical services to black beans.

PDVSA had used Caribbean facilities to