Often, what one parent perceives to be the other parent's choice, is not perceived in the same way by the Court, and I encourage you to have a read of this case for a demonstration of what I mean:
Bloom & Chesterman [2018] FCCA 680 (23 March 2018). Hopefully from this case, you can also take an understanding on how seriously the Court takes a situation where one parent isn't seen to be supporting the children's relationship with the other.
As to your matter, I have some questions.
When you say you were given
permission to move, do you mean explicit interim orders were made by the Court allowing you to relocate with the child? Or did the judge just make a comment in passing?
You also say you informed the Court. How did you do this? Did you file a notice of address for service? Did you serve that notice on the other party? As a parent, did you inform dad directly, or did you hope that information of his son's residential address would be transmitted by some other method?
When you say you missed a contact centre visit, did you advise the father of same? Did you advise the contact centre?
And what is the timeframe around all of this? When were you first in Court? When did the Court give you permission to move? How long has it been since? How old was the child when you moved and how old is the child now?