It must be tough for you. Well you need to confidently speak to them and tell them it’s not right. I m assuming your the youngest of the house
have you tried talking to them
usually this happens to someone who are nice in nature. Don't get me wrong but of this happens next time you need to let it out. Let your inner anger burst and draw a boundary. Let them know that you are not a person to mess with. Shout at top of your voice and make yourself heard. Then see the magic. Do not raise your hands. But raise the voice. Then see the magic.