definitely sounds like a scam. Apparently Cameroon is well known for animal export scams (mostly involving dogs, where you order your desired breed, send your money and never see any result -- quite why you would want to order a yorkshire terrier or English bulldog from Cameroon rather than from a breeder in your own country escapes me somewhat but never mind).
As jwer says, for an exporter of locally-caught African wildlife to be advertising squirrel monkeys, capuchins and kangaroos is a bit of a give-away. Not sure why you would want to be part of the trade in wild-caught endangered species anyway, but whatever floats your boat.