Untrue accusations about someone is wrong. Most victims are not aware that they even have a basis for a lawsuit. You have a case if you have endured defamation through slander/shaming/libel/bashing or baiting which include publications about you through social media. You are not in a powerless position. Save all social posts/comments that the provoker has directed at you. A lawyer can defend you.
The defamation laws aim to create harmony in the society. People should not ruin the reputation of others by making false statements and if they do, then they must be ready for the legal consequences. If anyone harms your reputation through slander or libel, then you can file a lawsuit against him/her for defamation. Read along to know when and how you can teach a lesson to the person trying to harm your reputation through slander or libel.