They don't grant their contract. They ask for certain amount in the contract you signed, later they came up with additional charges even they are clearly specified in the contract. DON"T DO BUSINESS with this crocks.
If you don't want to listen to all the people that was stolen by Argenshipping at least have the contract review by a lawyer.
Few tips (I had the problem on this):
1- dont do the contract in Spanish. The contract doesnt have legislation in Argentina, it has to be resolved here in the US
2- if you are not from Florida, make sure to add a clause indicating in case of complain it will be send to a Court in your State, otherwise you will have to traviel to Florida
3- state who will pay for the laywers expenses.
GOOD LUCK!