You need an embassy visa for Bahamas if you have a Democratic Republic of the Congo passport
Visa options for Bahamas
Visitor visa
Travellers need a visa to visit Bahamas for Business or Tourism. A paper or embassy visa is the only visa available for travellers visiting Bahamas. The visa is typically a stamp or sticker added to the passport. Travellers must apply at the consulate or local visa center.
This is not offered by sherpa°.
Apply on the government site.