That's good news and bad news.
Good that the problem was found. Bad that the lady may be able to do what you assume but I doubt it. We have seen many FTTC migrations on "full" cabinets fail. It seems to work with some sort of cease and re-provide, and the new waiting list can only have made that worse unless it has a routine to cover it.
It's even possible that's what went wrong in the first place

.
Looking back, I can see you've thought this about the full cabinet before. As well as the above, a further complication is that a (physical?) change has to be made at the exchange to move your fibre connection from TT kit to BT Wholesale kit.
The indispensable man or woman passes from the scene, and what happens next is more or less the same thing as was happening before.
My broadband basic info/help site -
www.robertos.me.uk. Domains, site and mail hosting -
Tsohost.
Connection - AAISP Home::1 80/20. Sync 59504/15641kbps @ 600m. -
BQM