As a bit more info (and potentially context) into what happens with OpenReach products
There are 3 address "types" within OpenReach's system-
Gold - There is an OpenReach service already at the property (and probably active) or there has been an OpenReach service at the property in the past.
Silver - OpenReach has pulled these addresses from the Royal Mail postcode database, but there isn't (and has probably never been) an active service.
Bronze - No one sees them very often, but let's say you want broadband at a guards house which isn't in royal mail's database, a Bronze address would be created and the order placed on that.
The "proper" way of changing a silver (or bronze) address to a gold address is simply to place an order for a service at that location, something that Vodafone's systems simply wont allow them to do based off the numerous reports of those issues (it probably has something to do with Vodafone stopping ADSL service, as a normal line has to be ordered and then upgraded unless you can get fibre all the way to the property, but that's just a guess).
Vodafone won't likely be able to proceed far with an ORDI request, as they can't update any information about lines (and premises) other than their own, and all it will do is confirm the address is, in fact, Silver - I wish you luck however!
Like in most of these cases imo, OpenReach says Vodafone can do something, which actually means "Vodafone is allowed to do this thing" and no one in Voda actually knows what they're doing.
Edit below:
ORDI = OpenReach Data Integrity
An ORDI request can change a silver address to a gold one, but only if the provider of an existing line submits a request to move the "location" of an existing line in the database to a silver address.
I'm currently on the phone with Vodafone trying to get them to submit an ORDI request to Openreach.
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