i have purchased a 5 day pass with bt wifi with fon.
i have connected to btwifi but when i go to log in it never takes me to the screen where i can click to use my pass.
Welcome to the forum, but have you tried the BT Wi-Fi helpdesk 0800 022 33 22? You obviously need a fast answer and that ought to be the best place to start.
See this link for logging in