It sounds like you are taken for granted by your family - and much too easy to boss around.
STAND UP for yourself...you 'asked' them to leave...they ignored you... you TELL them to leave, yell at the them 'Get out of my house" in a VERY loud and determined voice.
You say "he managed to get his way on what he wanted brought into my home".
No, you ALLOWED it.
ENFORCE the rules.
Put the fridge outside the building. IT IS NOT COMING IN! Stand up for yourself.
People don't 'barge in' if you lock the security door. Don't have one? get one. Talk through that next time.
Are you really just 'babysitting' your siblings for your parents? or not? Make sure you are not.
It sounds like your brother is like your old man, trouble.