A prayer against demonic posession

I know I sound crazy, but I am tired of staying silent. Witches have possessed my thoughts and have framed me for being mentally ill. I have been praying for the Lord to absolve me of my sins, and for the Holy Spirit to enter me, but they mock me as I pray for God and try to force me to pay attention to them and make me believe they are helping me. Pray for the Lord to absolve me of the shackles of the enemy and that I make room for the Holy Spirit to dwell within me.