Social Boycott in a charitable organization

I have been part of multiple social and charitable organization for many years. One very influencial person who is also part of same social and charitable organizations as me have been misusing her power and authority to influence other members in all these organizations to impose a social boycott where I have been taken out of email and whatsapp groups of the organizations, in some organizations, my membership is cancelled without any intimation, she actively defame me by influencing xcom members of the organizations and also threaten my close friends to take actions against them if they keep relation with me. This is all because I had protested for some unethical actions by the powerful lady, who is president in many of these organizations. I have raised formal grievence in one of the organization and they did not even respond to my grievence even after multiple followups, rather I was told do whatsever I can, they will not even respond. I have also raised grievence in another organization and they are also not entertaining my grievence and asking that I need to provide evidence first in email and then only they will consider. I have replied that we should have hearings where witnesses can be called and questioned to prove the social boycott imposed on me. Seems they are going to just not entertain my grievence. I need help. What should I do? I have been suffering with tremendous psychological distress due to this social boycott for last 3 years and I see they have also taken away my right to justice. Can I get a consultation with lawyer who is specialized in social boycott cases and help me understand how can I get justice and what kind of evidences I need to provide.