Welcome to TPG Community!
In some instances, you will receive the modem first even though the NBN service is not yet installed or activated. The installation time frame for NBN services is 2 to 30 working days.
I reviewed your account and learned that the internet issue has been raised to our Engineering team. They have escalated this with NBN Co. and their Technician will check the service network between today (10th of March) until the 13th of March. Your attendance is not required.
Further updates will be given by your assigned engineer.