Hello -
Free samples for any acai product are a scam. Once you receive the goods, none of the phone numbers work to cancel, and if they do, they say they will cancel and refund and then they dont. You will be billed a monthly charge plus shipping and handling. The only way to stop getting charged is to cancel your credit card. It will be hard to dispute, because you need to provide proof that you canceled, and since you cant get through to any of these companies, you cant prove you tried to cancel.
Go to a store and buy it straight out. At least you will know what you are buying.