For those that are truly scammed, its a no brainer as even .0001% is still a million % greater than 0%...which is the chance of getting the money back if she does nothing =)
nearly all AGs offices these days have an online complaint form to fill out...and even if many years down the road the company is taken down, your only chance of a settlement is if you filed the claim. there is certainly no harm in doing it...and the more people that complain the greater chance the company will be investigated!
now with that said, you have little to no shot of an AG doing much to help someone who has buyers remorse after the legal cancellation period....not to say it hasnt happened in the past...but given the number of folks that make the complaint they were lied to....and those successful in getting their money back....it is certainly some very long odds!
What I would do in your case is become the most annoying owner on earth, write letters, write emails, post on their facebook page all the lies and mistruths that were promised you during the presentation...demand they own up to the promises or let you out. (this of course assumes that the friend was indeed lied to etc during the presentation)
they are under no legal obligation to do so, but many times the "cost" of retaining a very unhappy member is far greater than just parting ways. I certainly wouldnt expect a refund though, at the most you can hope is to be released from further obligations....and even that is a big if!