Thanks for the response, I got sorted thank. Phoned a family member via WhatsApp, who phoned bt directly on another phone and had on loudspeaker so I could verify id etc. they raised a complaint, they said there is a known issue relating to the exit code 011 which means calls cannot be made, odd that there is no sign posting from BT on this, given the widespread issue.
The issue was resolved the following day, receiving confirmation via text from BT.
I'm so glad to hear you were able to get things sorted @Tiredof2026.
Rach