Please confirm you have installed your NCD and modem as per the link.
Also please advise what blue lights are on the NBN NCD
In most cases it will require an NBN technician to attend and complete the wiring in the pit outside your house.
The NBN installation team will advise you further. At this stage if you had an internet service before you installed the NBN equipment , then I would put it back in place and use it. Otherwise leave the NBN equipment installed and wait for an update.