Christians are compelled to tell the truth as a matter of faith and I find your attempt to accuse people of doing something that you can’t prove to be true as quite troubling and exceedingly dishonest.
You have not one shred of evidence that people who practice meditation are calling upon demons and the devil.
And you have no evidence to support that people who meditate are evil either.
You are lost in dreamland and should seek help from a strong Christian pastor with experience in demons.