Technically, when NBNCo updated their records, the Location ID (locid) that was previously assigned to your address has been assigned to another address instead. So when the other Provider placed an order using the locid, they basically placed it to a different address that shouldn't have an existing service, not knowing the locid is the one you're also using.
Now, due to conflict of records, NBNCo needs to get both parties to submit pertinent details (proof of occupancy document and NTD Serial Number) for them to amend the information on their database.
