This is something you have to accept and be ok with it when moving on from being in a toxic relationship with a narcissist.
Don’t try and get people to see you’re not what the narcissist is saying you are; just ride the wave and let God fight your battle for you and you will be much better off and eventually people will start to see through the narcissist’s lies and if they don’t, oh, well … you know who you are as a person and don’t have to prove anything to anyone. Just keep moving forward and focus on your healing and growth and don’t look back.