Do you mean just your WiFi, or your internet connection generally? What are the lights on the router telling you?
This has been flagged up to the support team here for you and they will respond as soon as they can, not before they are back online tomorrow though.
From the 29th of March our TalkTalk Community will move to peer-to-peer support and the TalkTalk team will no longer be here to support with queries. Don’t worry we still have 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 - Help & Support.
