It's nothing to do with any isp. It's Openreach faulty workmanship.
As you might have gathered from other responses, one at least being infinitely more authorative than myself, you seem to have no clue whatsoever about how the migration system works, and how little influence Openreach have over it other than processing orders from (their) customers (ISPs/CPs)
My broadband basic info/help site - www.robertos.me.uk.
Domains, site and mail hosting - Tsohost
Connection - Three 4G, tbb tests normally 35-45Mpbs down, 65Mbps off-peak, 9-24 up.
"Democracy means simply the bludgeoning of the people by the people for the people." Oscar Wilde
Edited by RobertoS (Tue 11-Feb-20 22:41:44)