I didn't post what you're replying to, but I'm also an Aussie who's been reading articles about the NBN disaster for its entire duration.
Sources are difficult because the NBN has been on on-going project for over a decade now, so there's an absolute haystack to search through, and all the hay and most of the needles are strongly coloured by political ideologies.
Whirlpool has what looks like a comprehensive timeline / article here: https://whirlpool.net.au/wiki/nbn
I always found http://delimiter.com.au/ to be the best source of information around the progress (or otherwise) of the NBN. Here are a couple of semi-targeted articles that demonstrate the depth and density of this political quagmire:
http://delimiter.com.au/2013/01/17/fact-check-the-nbn-wasnt-...
http://delimiter.com.au/2013/07/19/breaking-the-rules-how-nb...
http://delimiter.com.au/2016/03/29/qa-panellists-agree-polit...
The whole issue goes back before NBNCo was created, however, to when Telstra, the government-owned monopoly infrastructure owner, was sold without being broken up into wholesale and retail arms, thus meaning their retail plans directly competed with those of their wholesale customers. The Australian Government at the time didn't see that as being a potential problem in the future, and yet here we are...