Many thanks for coming back and posting again in the Community
I'm sorry t o hear about the TiVo and your experiences, I've been running some preliminary tests and looks like there's an ongoing SNR issue that is affecting TV and Broadband services in the local area. The reference for this is F004356853 and we have an estimated review date of 18th April 2016.
I'll keep an eye on this and touch back with you then
Take care and any questions in the meantime let me know