I think BT actually gave my folks about £25 as a sweetener. I did think (and might have suggested) a bunch of flowers would have been nice, but nothing like that happened By that stage I was too worn down to argue any further, it was enough that my folks had their line back. To be fair to TT, and the lady in their Exec Complaints Dept, they were doing their best to fight the automated systems whilst trying to maintain a working phone for my parents, and she did call me every day to keep me informed. The fault really was that the BT failsafe didn't work
It might have been easier/quicker for TT to submit a desist, wait, then get BT to place a reprovision, but with my folks needing a working phone line this wasn't really an option.
However, it should be just as quick/easy for it to be unwound as it is for them to mess it up in the first place!
We did submit a complaint to OfCom but never heard anything of it...