From an assistant of the Ohariu MP...
I have contacted Chorus who say that Snap does have an ‘escalation process’ available to them which they may choose to use and that then they will be able to inform you of the progress of your UFB connection.
Chorus did not wish to clarify what this process is and said the information would be passed onto you by Snap.
I guess now I wait for Chorus and/or Snap to get in touch with me about what this escalation process is. I'd have thought Snap would manage this themselves, four months really is unreasonable. They don't seem to do anything unless I call them though. I guess I'll wait and see.