Hi Lynne, after numerous phone calls to TTnet (wouldn't answer the phone, answered but in Turkish etc etc) eventually someone took my details and said they would pass thru' to technical dept. Had been advised to turn modem on/off a few times. Technies eventually reconnected me (without my knowing!) at around 8o'clock Friday.
Keep trying TTnet, someone will eventually help.
Assuming you have 4 green lights on modem?