Cannot use Internet

[#1]

Since Thursday night I haven't been able to use the Internet at all. My connection seems fine, but every website redirects to 62.6.38.125 with a BT wholesale service information page. Further, my ip address seems to be 172.16.19.183 which might be an issue. I've tried changing the DNS and doing a router reset. Nothing is working.

[#2]

Am I going to get any help here?

[#3]

You're missing the @plusdsl.net in your username.
If you follow these steps you should be able to get online.
1) Go to 192.168.1.254 in your browser
2) Where it says 'Broadband Username' click the change button
3) Enter the router password
4) Click disconnect
5) Add @plusdsl.net to the end of the username and then click connect