Hi @Sol Silverstein really sorry this is happening to you. Unfortunately, with out an earnest money deposit your only real option is to sue for damages. You can certainly make a report to the board about his conduct but that ultimately doesn't help you much.
The best way to sue for damages would be to get the property under contract again. If on your second contract you are only able to secure an amount that was lower than your original contract, the difference is a very real amount you could sue for. You'd also likely be entitled to the buyer paying other damages as a result of his negligence and attorney fees. I'm not an attorney so I would of course consult the attorney representing you on your transaction. But these are the things I have seen in the past dealing with these sorts of issues.
I had a similar deal fall through for one of my clients recently. We were contracted for 250k and the buyer kept pushing closing and eventually ghosted even the buyers agent. The next contract we secured was fortunately for 240k. And the seller didnt think it was worth the time to go through with suing the buyer. So many times it won't be worth it. But I would go back to market immediately and if there is a significant different in what you are able to get on the market now, it might be worth taking him to court.