TalkTalk Barring off(on) & unable to turn Off or disable?
This finally worked for me (1 of 2 items). Login to your [user account] then [Myaccount] / [My Services] / [Phone] & or [Broadband] [Phone] / [Manage phone boosts] / [Bar features] uncheck OFF(or check ON) [International bar] [Premium rate bar] [Mobile bar] - UNCHECK
now look at [Broadband] options in the section above [Phone] that you were editing.
I hope this option disables the "Calls to this number are Barred" notification preventing calls.
Fingers crossed for all that are struggling with this issue.