Hi BirbL86 👋 welcome to the community! Thank you for posting.
Sorry to hear about these issues with your mum's TIVO box!
You are completely correct, sadly the upgraded boxes (V6 and TV360) require a broadband connection in order to work, and we no longer offer new TV only packages on this basis.
It also would not be an option to simply swap her TIVO box with yours or your dad's as they are provisioned directly with your accounts.
However I do appreciate this is a concern, and I have empathy for your case so I will send you a PM to see if it is possible to get her box swapped out for another TIVO. I will need to contact the area field manager to request this. Please note I cannot guarantee this is possible at this stage, but I will do everything I can to support with this.
It's also worth bearing in mind that if we are unable to swap the TIVO to another box and your Mum's package needs to be changed this is something we would need to discuss and complete with her directly as the account holder. You would not be able to do this on her behalf. (We also don't generally support with package changes via the community.)
But as I say, I would like to help so I will send you a PM to confirm a few account details and see what I can do. You can find my PM in your Inbox in the top right corner of the page. 📩
We can return to this public thread with an update when possible. Thanks for your patience in the meantime whilst we look into things and offer further support!
All the best. 🌞