to sell someone into indentured servitude of hard labour (lit., "sell the little pig")

to play a trick on, to defraud, to con

to betray

(phrasal verb) to traffick labourers overseas to work as coolies; to betray / to trick (usually only used in the passive voice, 'to be betrayed' / 'to be tricked'; refers to people who have to sell themselves into slavery when driven by poverty

to be trafficked as labourers to work overseas as coolies; to be betrayed / tricked by someone; to be sold out by someone [colloquial]