Look in the Dial-up properties ...
Get the number ...
Contact BT and ask for the originator and owner
Book a ticket
Stop off en-route to Airport to obtain Bollock Filleting Knife
Catch plane across the water - Cos that's where they'll be

Run Adaware Pro with latest Definitions to remove scumware and shit from Registry.
Manually remove the Dial-up entry in Dial up settings after restoring proper numbera andsetting it to default.