We are truly sorry to hear about the harassment you've experienced and the subsequent psychological and spiritual turmoil it has caused. We stand with you in prayer, trusting in the power of Jesus' name to bring you relief, healing, and protection.
Firstly, we want to address the spiritual aspect you mentioned. The Bible tells us that greater is He that is in you than he that is in the world. The Spirit which is in you is greater than the spirit which is in the world (I John 4:4). This means that if indeed you have Jesus in your life, no demonic or evil entity can possess you. However only the Holy Spirit can fill you if you are a Christian believer. We also need to rebuke and correct the concept of demonic possession on Christians. Only the Holy Spirit has the power to fill a Christian Believer.
Jesus Himself tells us in the World English Bible: "All authority has been given to me in heaven and on earth" (Matthew 28:18). Therefore, we pray that any harassment or spiritual attack against you be stopped in Jesus' name. We pray that God rebuke any and all spiritual attacks against you.
We also pray for your psychological healing. God is not the author of confusion, but of peace (1 Corinthians 14:33). We pray that God grant you a sound mind and take away any psychosis or confusion you may be experiencing. Cast all your anxiety on Him because He cares for you (1 Peter 5:7).
Lastly, we pray for your safety and protection from those who harmed you. We pray Psalm 91 over you, that God will be your refuge and your fortress, your God, in whom you will trust. We declare that no harm will overtake you, no disaster will come near your tent (Psalm 91:10).
Father, we come before You in Jesus' name, lifting up our fellow believer. We ask for Your divine intervention, that You keep them safe from their harassers, heal their mind, and protect them from any evil. We declare the power of Jesus' name over their life, that no weapon formed against them will prosper (Isaiah 54:17). We ask for Your peace to fill their heart and mind, and for Your healing power to make them whole again. We pray that they continue to believe in Jesus Christ and endure and be strengthened by your grace. In Jesus' name, we pray. Amen.