Although I think the BBB is not a scam, there are still many other routes to take. There's always a potential for a class-action law suit. Some law firms specialize in that and work cases only taking money from any final winnings in court.

And the attorneys general are usually happy to hear any complaints. While there's often not immediate results or consequences, having made an official complaint helps those who are seeking to apply some rule of law via the justice system.