Have you tried the router connected to the test socket, which is behind the master socket's removable faceplate (if you have that design)? You will need to use a new or known good microfilter.
The TalkTalk Community has now moved to a peer-to-peer support model. This means that the TalkTalk team will no longer be here to support with queries. Don’t worry, there are plenty of ways to reach out if you need to speak to TalkTalk directly. For more details check out the link here
How to contact TalkTalk Broadband - TalkTalk Help & Support
