Joseph Auga Matamata, was sentenced on Monday to 11 years in a New Zealand prison and ordered to pay over $NZ183,000 in reparations to his victims.
The Samoa Observer newspaper spoke to a woman who was taken to New Zealand by Matamata, with her younger brother, when she was 15.
She said 11 years was too short for what he had put them through.
A relative of the victim said he had hurt a lot of people, including children, and deserved a longer sentence.