Welcome Sweetpetals,
I'm sorry for the circumstances that brought you here.
A few things:
First, I know you say you are aware it is a scam, but your subject "I think I'm being scammed" concerns me a bit, so I just want to emphasize the fact: There is absolutely NO doubt about it. Even without seeing anything else, I can tell you with 100% certainty that it IS a scam.
The Ghana location, long period of time, and increasing fees alone show that this is advance fee fraud, but the FBI/CIA bit makes absolutely no doubt. Scammers love to threaten people with the FBI and CIA, because the names of those agencies often scare people, and may cause them to send more money. Sometimes the scammers even bring up these American agencies when there are no Americans involved in the scam!
In reality, the scammers have no idea what these agencies even do, or they wouldn't make such idiotic claims. For starters, the CIA deals with espionage. They have nothing to do with personal financial deals. I don't care whether the "deal" involves unclaimed bank accounts, lottery winnings, inheritances--the CIA has nothing to do with ANY of these things.
As far as the FBI goes--if you were in a legitimate business transaction, and you failed to make a payment, the FBI would also have NOTHING to do with it. The FBI may be involved in a case of fraud, but you have received n no money. A missed payment on a contract is a civil, not a criminal matter, and your business "partners" would have to take you to court. Of course they can't do that, because there is no legitimate business transaction involved.
If you could post some of the names and email addresses, as well as the emails the scammer sent you (remove your own name and email address first) it will help to alert others of the scammers.
If you are a citizen of the United States, you can report the crime to IC3 here:
http://www.ic3.gov/complaint/default.aspx If you are a citizen of another country, you will need to report it to the authorities in your own country. Unfortunately, you are not going to get your money back.
The scammers may promise your money back, or you may be approached by someone claiming to work for an agency who can get your scammer arrested and/or get you money. This is what is known as a recovery scam. The people involved will be the same scammers who stole your money in the first place--they are just playing new characters in an attempt to steal more of your money.