here's what I use - US/CA - 1 800 560 1640 - never had a problem with the #
I'm using NT with the CQG feed which had a connection problem early today
the pop-up message provided the CQG 1 800 Support # - fixed when I phoned
you can also check the NT forum / Connecting to see if there's any feed problem
which might be NT rather than CQG or Z-F
NT doesn't have phone service but it's email Support is quick