Further update.
Tried BT. Well, they just tried to sell me broadband, shame on them. But they could not, themselves get around the OpenReach 10 day cooling off delay either.
Went back to the provider who slammed me, who I also have my mobile with and ... after a few transfers and remaining as nice as possible with them they added 50Gb of data to my mobile to keep me online until I'm back on line.
Tried BT. Well, they just tried to sell me broadband, shame on them. But they could not, themselves get around the OpenReach 10 day cooling off delay either.
Went back to the provider who slammed me, who I also have my mobile with and ... after a few transfers and remaining as nice as possible with them they added 50Gb of data to my mobile to keep me online until I'm back on line.