Welcome to the forum Kasxet!
Where are you from?
What do you practice? You said you had tried evoking, what system was that from - Solomonic or more Modern Grimoiric like in E.A.'s methods?
That sound like full possession - you need to banish and cleanse and they set up wards so it can’t come back. This is why “spiritual hygiene” (inked below) is of paramount importance.
if it hangs of with a nice banishing then it’s had fair warning and next you learn how to kill it - which is actually pretty easy as you are stronger by far. See the “Parasites collection tutorials”
Here is a getting started with magick guide.
You’ll want to get your spiritual hygiene sorted out, and start work on developing your astral senses.
Then when you can know you have a decent chance at avoiding impostors and parasites then try the first contact guides we have on here.
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