Great, so it’s clear you have power over it, so you’re already there.
Next step: close the door and lock it out so it doesn’t come back, because banishing daily is a pain in the arse. This is called setting up “wards”.
THere are many ways to do this, shields around just a person are a kind of ward, I like to put a salt circle around the whole house, seeing the energy connect in my minds eye creating a barrier nothing unwanted can get past.
You can also look up “ward tutorial” and there should be a few on here.
White sage the whole place mixing the smoke with whitegold energy from your heart, watch the shadows flee. Darkness can’t exist in your light. Super easy and intuitive stuff. 
For the people, you could try banishing and cleansing the parasites off of them, and sending them healing energy. Having the wards up so they are less affected by worldly crap always helps.
Haha, yes classic parasite behaviour: they always always pretend to be more than they are, and they pick something they know scares you. For xtains they claim to be the devil or beelzebub, for people that know better they start in with goetia names, deities, anything really.
Note: the auto flag on the word is because it’s sometimes used in a criminal context, and we try to keep that off BALG, this is fine as it’s a magickal context.
But on that note, those are not spirits, they are humans and they attack physically. A real skin walker spirit is a spirt of winter starvation, and unless you’re actually 70lb and at deaths door, starving in winter it’s not going to come to you to possess you and make you eat your family. That’s what they do.