Forceful treatment by doctor causing pain and harassment

The dentist after briefing the rates asked to see whatever have been done till date n later gave overdoses of anesthesia n did root canal of a perfect tooth. I stopped but they forced. As had come from other treatments n sonography was in pain n couldn't talk, stop n was kind of unconscious... Now been two weeks I can't eat brush as my jaws stuck n in pain. They took money for what they did as per them though it wasn't c. what action can I take.