Welcome to the community, Peter.
I'd love to help raise this to our Engineering Team so they can dispatch NBN technician to fix the cables right away. Shoot me a Private Message with your account details (Username/Customer ID together with the address on file) also include your best contact number and preferred time.
After over 5 years of flawless NBN 50 our Arris CM8200 and our Archer VR1600V have died, I humbly request a tech appointment to replace the cable modem, it was destroyed by lightening around 2pm yesterday afternoon.
Again TPG have been the single best ISP experience since 1998, over 22 years of ISPs, and I need that tech to swap out the modem, please.