From your profile it appears that you are a "home buyer"; not an agent. I suggest that if you have a valid complaint that first you contact your Broker's office leader to discuss the situation. But....if your Broker is the one in charge then contact the local Real Estate Board for Plaistow to determine if your Broker has done something against the Code of Ethics and/or illegally. Another option is to call a real estate attorney about the matter.
Here is the link to the web site of the Granite State South Board of Realtors which includes Plaistow:
Prudential Connecticut Realty
You have a choice to make.
It hope it is a better one than choosing to go to a public forum to vent without the facts from which to support this allegation.
Find another broker who is not aware you blasted 'broker extortion' over the internet and start over.