Possession by a being with evil or mischievous intentions is not amazing at all. Trust me on that one.
My advice is, don’t allow anything to possess you unless you explicitly invite it to do so. Don’t extend an invitation unless you are 100% certain of the being’s intentions, and you have a working relationship with it that’s based on mutual trust and respect.
As for banishing, you can get a burn bowl, fill it with water, place a black pillar candle in it with a ring of coarse salt around it. Put this in the centre of your home, then light the candle. The candle acts as a portal for the entity to exit through. Recite the exorcism from KoF in every room in your house with a tone and feeling of authority. Do this twice a day until it’s gone.