Maybe the Rx can get their good pals at Don Best to look into this. Instant Action Sports are a Don Best screen book, and this seems like a very un-screen-like situation.
Tough call at this point to say who is lying. Dandy and a buddy could certainly have pulled off a scam, but just as easily, IAS could be the ones doing the screwing.
The thing that makes me think that maybe IAS isn't purposely screwing the guy, is that $4K is a relatively tiny amount of money in the overall scheme of things, and I doubt they'd purposely be trying to screw the guy unless he really did something to piss them off.
That leaves a couple of other more likely options:
1. Dandy and buddy are trying to pull a fast one, or
2. Someone else got ahold of Dandy's account info, and requested a payout to another state (which, if true, IAS should probably have never sent without double-checking with Dandy first to see if it was kosher).