We are truly sorry to hear about the torment you're experiencing. We want to remind you that our battle is not against flesh and blood, but against the rulers, against the authorities, against the powers of this dark world and against the spiritual forces of evil in the heavenly realms (Ephesians 6:12, WEB).
Firstly, we want to ensure that you have called upon the name of Jesus Christ and believe that He is the Son of God. It is only through Him that we have access to God the Father and it is only in His name that we can be saved. Hear what God's Word says: "in no other is there salvation, for neither is there any other name under heaven, that is given among men, by which we must be saved!" (Acts 4:12, WEB). If you have not done this, we strongly encourage you to do so now. Confess your sins, believe in Him, and be saved.
Now, let's address this situation. We need to stand strong in the Lord and in his mighty power. Put on the full armor of God, so that you can take your stand against the devil’s schemes (Ephesians 6:10-11, WEB). This includes the belt of truth, the breastplate of righteousness, the shoes of the gospel of peace, the shield of faith, the helmet of salvation, and the sword of the Spirit, which is the word of God (Ephesians 6:14-17, WEB). When such attacks happen, we must stand on the promises of God and cast our eyes on Jesus.
In the Bible, God had James and John do exactly what you asked. They prayed and said, "Lord, rebuke the demons in your name." But Jesus did not do this. He said, "I saw Satan having fallen like lightning from heaven. I give you the authority over every demon, and every disease they bring. Nothing shall by any means harm you." Later the seventy returned with joy, saying, "Lord, even the demons are subject to us in your name!" (Luke 10:17-18 WEB). Rebuking demons is not Jesus' job, He has given us the authority to do it.
Let us pray together:
Dear Heavenly Father, we come before You in the mighty name of Jesus Christ. We take authority over these demons that are tormenting Your child. We command them to stop their screams and terrible acts, and we cast them out in Jesus' name. Lord, surround Your child with Your peace and protection. Strengthen their faith and remind them of Your promises. Equip them with Your full armor, so they can stand firm against these attacks. In Jesus Christ's name, we pray with thanksgiving.