I won't go into the JW detail of how some of these were resolved but I will say that merely calling on the name "Jehovah" didn't work. I actually think the demons were amused by that, if they left off their "attack" it may have been because they were annoyed with it not charmed away by using a name.
I agree.
The bible agrees.
The WT advise that demons are subject to the name of "Jehovah" is totally false like everthing else they teach.
The practical evidence from this thread demonstrates the fact.
There is one name only to which everyone in heaven and earth are subject to
Philippians 2:10 (New International Version)
10 that at the name of Jesus every knee should bow,
in heaven and on earth and under the earth
Jesus' name has not lost any power
Mark 9:38 (New International Version)
38 "Teacher," said John, "we saw a man driving out demons in your name and we told him to stop, because he was not one of us."
Mark 16:17 (New International Version)
17 And these signs will accompany those who believe: In my name they will drive out demons; they will speak in new tongues
Luke 10:17 (New International Version)
17 The seventy-two returned with joy and said, "Lord, even the demons submit to us in your name."
Acts 19:13 (New International Version)
13 Some Jews who went around driving out evil spirits tried to invoke the name of the Lord Jesus over those who were demon-possessed. They would say, "In the name of Jesus, whom Paul preaches, I command you to come out."
All the best,
Stephen