As already stated , nothing stopping you ordering with whoever you want to use and that ISP getting Openreach to correct any data inconsistencies ( ORDI ) then allowing you to upgrade to FTTC once that is done , what you ( quite unreasonably ) expect is BT to sort out the error so you can order with a competitor company….BT have exactly the same interaction with Openreach as every other ISP , including the company you would prefer to use.
If the previous occupant of the address had FTTC , then obviously it’s possible , even with the supposedly incorrect address info to get FTTC ordered , so if BT managed to do it , no reason why your preferred ISP couldn’t also arrange it.
Openreach don’t normally interact with consumers , so it’s ‘lucky’ that you got to speak to them directly, but they also shouldn’t have mentioned ‘BT’ , unless you indicated that it was BT you intended to use, it’s unfortunate that you appear to have been given the false impression that data errors like this are something that BT are responsible for …they are not, unless you were already a BT customer and the data error was affecting your ability to switch to someone else , but you are not a BT customer , so you are owed nothing from BT.
