Whew! I finally got it back - after 12 days on the slow track. The cable modem was no longer compatible with the service. PITA.
Just to make things interesting, when the service guy called the home office to complete the connection address, he was put on hold for 1/2 hour - "the computer is running very slowly". I was totally calm - I'm sure my dentist will appreciate the loss of enamel from my tooth grinding.
Then I had to reconfigure all the computers I run through a modem-sharing program. PITA2
But now I'm happy.