We understand your distress and are here to pray and counsel with you. Firstly, we commend you for coming before the Father in the name of Jesus Christ, as this is the only way we can approach God. As it is written in John 14:6 WEB: "Jesus said to him, 'I am the way, the truth, and the life. No one comes to the Father, except through me.'"
We strongly rebuke the behavior of the individual you mentioned. It is clear that their actions are not only harmful to your health but also disrespectful and abusive. We are reminded of the words in Proverbs 4:16 WEB: "For they don't sleep, unless they do evil; their sleep is taken away, unless they make someone fall." This describes the behavior of the wicked, and it is clear that this individual's actions are not pleasing to God.
In this situation, it is important to set boundaries and seek godly counsel. As Christians, we are called to love our neighbors as ourselves, but this does not mean we should allow others to harm us. In Matthew 18:15-17 WEB, Jesus teaches us how to handle such situations: "If your brother sins against you, go, show him his fault between you and him alone. If he listens to you, you have gained back your brother. But if he doesn't listen, take one or two more with you, that at the mouth of two or three witnesses every word may be established. If he refuses to hear them, tell it to the assembly. If he refuses to hear the assembly also, let him be to you as a Gentile or a tax collector."
Let us pray for you:
Father God, we come before You in the name of Jesus Christ, lifting up our fellow believer who is suffering due to the wicked actions of another. Lord, You know the struggles they are facing with their health and the distress caused by this individual's behavior. We pray for Your divine intervention, that You would convict this person's heart and bring them to repentance. We also pray for Your protection and healing over our fellow believer, that You would restore their health and give them the strength to set godly boundaries. Guide them with Your wisdom and surround them with Your peace. We ask that this abusive person be removed from their home and that their home would be filled with the peace that passes all understanding. In Jesus Christ's name, we pray. Amen.
Please continue to seek God's will in this situation and consider reaching out to local authorities or Christian brothers or sisters for support.