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We did an article that you may find helpful, this will guide you on how to track your NBN service installation. How to track your TPG service installation
Once the NBN service installation is complete you may proceed on setting up the equipment or the modem/router. You may check this guide.
In this particular case, we've seen that the service is installation is not yet complete, if you wish to get an update, you may contact our NBN Provisioning Team directly via chat you may visit this link https://www.tpg.com.au/chat/service-delivery