OT: Need expert telecom advice

[Joe Lowder]

One of my Google Voice numbers has stopped working correctly and neither
google nor the the google product forum is able to assist.

I am willing to pay for expert assistance to resolve this.

Calls to one of my two google voice numbers is continuing to work correctly.

Calls to the second have worked correctly for several years, but within
the past week, calls from land lines are now being answered with this
recorded message, "That number has been disconnected ..." Voice calls
from mobile phones to the same number are processed correctly. Text
messages are also received and processed correctly.