Speak with Hanzabu in the courtyard of the Necropolis.
A deal is a deal, and I pay my debts.
Bwonsamdi is a mighty loa and you are going to need a powerful ritual to obtain his attention.
You are in luck. I already know exactly what needs to be done.
Bwonsamdi's temple, de Necropolis, is just to de north. Meet me in de courtyard and we shall see about obtaining an audience with de loa of death.