I rented the adjoining beach house (Magharibi House) from one of the people who runs Baraka Aquarium Bungalows in Nungwi, Zanzibar, Ahmed Kassim Ahmed (0777484165) for the 2012 new years weekend. We received pictures of the house via email and paid a deposit to the rent the house for two nights through an agent in Stonetown. I confirmed verbally on the phone with Ahmed about the details.
When we arrived in the evening he tried to pretend that we had rented two basic, cheap rooms in what looked like an otherwise abandoned property across the road from his Baraka Aquarium Bungalows property. He refused to admit that he had switched the reservation and would not refund our money completely. After much complaining, he put us in another house far away from the beach in the middle of a field on the east outskirts of Nungwi town. He refused to negotiate significantly (reduced $100) on the amount of payment for the house and given that we were otherwise homeless with night setting in (everything is booked new years in the north of ZNZ - hence why some scam artists think they can take advantage of tourists like this) we were forced to stay there. The place was ok but definitely not a beach house that you rent for $250/day, the security was sketchy, the owner of the house used his key while we were staying there and we found him sleeping on the couch and cooking in the kitchen at times, and there was no water after the first day.
Upon leaving we argued that we would not pay full price as we were not given the beach house promised and things did not even work in the temporary accommodation. We tried to pay $60 of the remaining $150 owing and he started threatening the group and not letting us leave. He then went to the police station with us and started telling the police fabrications about our situation (that we agreed to pay several hundred dollars more, that he never switched the houses, that we were fleeing without paying). We ended up just paying the remaining amount to leave and not deal with their particular Nungwi police station version of justice. While in the police station Ahmed was verbally threatening my other guests with physical violence and retribution.
Do NOT do business with this tour operator, rent housing, or have anything to do with his businesses (Baraka Aquarium Bungalows, Magharibi House, etc).