You asked on your previous post why there would be more than one address for an account, AFAIK, in the past it was possible to have an billing address , different to the address the service was being supplied at, more a business thing ( but presumably some residential customers may have benefited ) you could have several addresses but wanted all the invoice/bills to go to a central point for payment…( basically the branch office ‘bills’ were sent to ‘head office’ for payment ) …probably a historic field in a computer database that’s not needed anymore ( especially for residential ) with direct debit etc, but if filled in incorrectly could cause issues, it however shouldn’t have any effect on moving providers as it’s ‘BT’ rather than OR.
If your ORDI has been checked previously ( and was OK or amended ) then issues you have may not be down to that, if of course it’s still wrong, it should be sorted, but you did say it was done on your early post.
