Welcome to TPG Community!
Thank you for raising this with us and we apologise for the inconvenience.
May we know the brand and model of the modem that you received? Can you please post a picture of it?
The modem/router that you received is the correct one.
It is a VDSL/ADSL modem which is compatible with the NBN FTTP/FTTB/FTTC/HFC service.
Should you require further assistance, please let us know.