Hi @Dee05 ,
TPG do not advise to bring the existing NBN box to the new address when relocating the service because it has a unique location ID which will only work on the address where its first installed. All the ISP across Australia is mandated to follow this since the NBN box is owned by the NBNCo.
I was able to locate the account using your community details and seen that one of our Account Specialists from our Moving Home Team offered you a SIM card, do you wish to speak with them about this?
If so, shoot me a private message with your best contactt number and preferred time.