Who knows.... They certainly don't, since they keep giving me a new guaranteed resolution date every 2 weeks.
If you look in their forums there's loads of people with BQM's like mine. I think it's just oversubscription and them waiting till utilisation drops off after lockdown.
I've been working at home since March and it has been getting progressively worse in this Lockdown. I need internet access all the time for my job and spend at least half my working day on video calls, usually facilitating so I need a stable connection.
While that’s a pretty bad BQM and certainly needs urgent investigation, ISP data usage increases significantly year on year, it does the same when you upgrade your customers packages to a higher speeds (M500 to M600 for example) and launch a gigabit service. I’d go as far as to say those are the exact opposite of what anyone trying to hide or ride out a high % of utilisation/over subscription would do as it would just draw attention to the issue.