there are many emotions that comes after people show their distrust in you. Those emotions mainly involve disappointment and anger because it make us feel that I am not the person who can influence them, and anger mainly comes when they are stopping us from doing something because of their distrust
just show your middle finger to them if they won't believe you let them. you are saying the truth and you are confident about is enough. ONE DAY THOSE PEOPLE WHO ARE NOT BELIEVING YOU RIGHT WILL SURELY GOT TO KNOW ABOUT YOU AND THAT TIme THEY WILL REGRET SO BADLY.