Frustration and can't close

[Robenson Exume]

Hello all,
I think I have done something real stupid and I want to share and need help to fix it. I am dealing with this broker that does not seem able to get me to closing. I have given him all the money that he has asked of me.( I know, stupid of me). Long story short is all I have so far is an appraisal. He keeps changing the closing dates. Now the seller is frustrated (rightly so) and wants the contract null and void if he changes the closing dates again. The broker insist that he can get the deal closesd. However, I have lost all faith in him delivering. He says over and over again that he will return all my money if he does not close. Now, what are my options? How do I get my money back? Do I need to lawyer up to get the money back? I did not give him all my money but the money I gave...I want it back. Please help, if anyone else has been through this, please share.
Thanks