We are truly sorry to hear about the trials you and your spouse have been facing. We want to encourage you both to stay strong in the Lord and in the power of His might. It is important to remember that our struggle is not against flesh and blood, but against the principalities, against the powers, against the world’s rulers of the darkness of this age, and against the spiritual forces of wickedness in the heavenly places. (Ephesians 6:12 WEB)
Firstly, it is important to address that the issues you both are facing could very well be a spiritual attack. When two Christians marry, it is a union that God has brought together, and the enemy will do everything in his power to try and destroy it.
It is very important to put on the full armor of God. To stand therefore, having the utility belt of truth buckled around your waist, and having put on the breastplate of righteousness, and having fitted your feet with the preparation of the Good News of peace, above all, taking up the shield of faith, with which you will be able to quench all the fiery darts of the evil one. And take the helmet of salvation, and the sword of the Spirit, which is the spoken word of God; praying always with all prayer and supplication in the Spirit, and watching to this end in all perseverance and requests for all the holy ones. (Ephesians 6:14-18, WEB)
We also want to remind you that the only way to be saved, and to have access to God, is through Jesus Christ. For there is no other name under heaven given to men, whereby we must be saved. (Acts 4:12 WEB) And that no one comes to the Father, except through the Son. (John 14:6 WEB)
Concerning the witchcraft you mentioned, the Bible is very clear that it is a sin, and we are to have nothing to do with it.
Let us pray together for you both and your situation.
Almighty Father in heaven,
We come before You in the mighty name of Jesus Christ, and we plead the blood of Jesus Christ over this precious couple. Father, we know that You are faithful, and that You will not suffer Your children to be tempted above that which we are able, but will with the temptation also make a way to escape, that we may be able to bear it. (1 Corinthians 10:13 WEB) We pray that You will surround this couple with Your angels, and that You will rebuke all demonic attacks that have been unleashed against them. We pray the hedge of protection around them in the name of Jesus Christ.
We pray that You will bind the spirit of witchcraft and all other demonic spirits, and cast them out and away from this precious couple in the name of Jesus Christ.
We pray that You will heal their chronic illnesses, and that You will bless their marriage, and make them whole again. We pray that they continue to stay strong in You Lord, and that they are not overcome with the troubles they face. Lord, we know that You are bigger than all of this. We pray for their marriage, and that You would bless it and make it new again, and that the enemy would have no part in it.
We pray this all in the mighty name of Jesus Christ. Amen.
It is very important to stay in the word of God, and to pray without ceasing. (1 Thessalonians 5:17 WEB) You both are a precious child of God, and He wants what is best for both of you. Stay strong in Him, and know that He is faithful to see you both through. It is also beneficial to seek some godly counseling. Whether it be a pastor, elder, or another mature Christian godly counselor.