Great to hear of success re sound problems and thru NCAT. Have you read their reviews? :((
I had this problem a couple of years ago living in a studio apartment, when an almost baby moved in above with his angry mother and began stomping and banging on the floor above my bed. I tried polite requests but this only made her crankier, and she began abusing me on common property.
Even tho the family that had rented the studio lived in the same building, they were no help. Nor was the Strata Manager. I did consider NCAT, but being an older person, in the end I retreated and had to move to save my sanity.
Dianne