If they can show, with something in writing, that you were NOT due the money, then what the morons told you will be of no matter - unless you happened to record the conversation (and that the recording is permissable by your state laws).
I would advise them of what the other two told you and have them show you in writing why you are not due the money.
...and if they do, you're pretty much stuck...unless you can (and want to) find an attorney who 1. Thinks you have a case, and 2. Is willing to take it on.
...but I'm sure you'll find that you'll need to shell out some bucks in advance to pursue it.
Sorry to pass along less than pleasant news...
