I would think you would need to contact that company. However, it is easy to get yourself a new WAN IP address. Not knowing what package you are on, leave the router off for about an hour on Full Fibre, or overnight on Broadband or FTTC.
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 - TalkTalk Help & Support
