No Account Returned From UPDA using Insignia/FireTV

My son gave me a new Insignia/FireTV and I currently have DirectTV as a provider. (1) For a couple of weeks I was able to watch all my channels, but one day I wasn't able to get  the Disney channel on the FireTV. The error message is "0066: No Account Returned From UPDA." The Disney activate site asked for a 7-digit number, which I can't find.  I have spoken with (5) people at Disney, someone at Insignia, and DirectTV, none of whom know anything about this. I have researched it extensively but cannot get any help with this. (2) Apparently I also have a "VPN code" - whateve that is - which is preventing me from watching things on another tv. Have e-m'd & left a phone message, but can't find anyone who can explain what it is, how I got something I am now being charged for monthly. Sorry for taking so long. I'm praying someone out there can help me! Thank you!