Who is able to freeze a bank account the attorney or the collection agency?

I got a bill from my attorney three days after he was disbarred. I sent him a check and then cancelled it because I wanted to review the bill. I had 30 days to pay the bill so I wasn't worried. Before I could work out a plan with him, he turned into a collection agency and froze my bank account. My lawyer was disbarred and his bill was not due yet. He acted like he was a collection agency and now says I was scammed by someone who said they worked with a collection agency. I would really like to see him in trouble for doing this.