On the bright-side, if you haven’t been the previous supplier’s customer for the last two years, I would think you’re entitled to a refund and possibly compensation. Surely, it’s illegal to be taking money out of someone’s account when they are not your customer?
it was the fact that you had a connection problem before moving to BT and not subsequent to your move whereas your initial post suggests problem only happened since you decided to move to BT
The LOS ( loss of signal ) light on , indicates that there is no ‘light’ being detected at the ONT , if there was some storm damage near the pole it’s possible that the fibre dropwire has been damaged ( hence the LOS ) however if this storm was after the original problem it may be unrelated…however the obvious place to check is at the pole top and if that needs a hoist to access the pole , then that’s the way it is .
TBH , I’d be concerned what the problem was with the previous ISP , and why they were unable to fix the problem .