Hi Liverbird,
I called them every day pretty much and I kept getting told the same thing... if there are changes I will be notified... even to the point of them saying they will resend all correspondence to myself (which never came!).
Towards the end of last week I got through to somebody who seemed to understand what my problem was, and she eventually sent me the official updated itinerary.
Have you tried logging out of cruise control and see if it updates? Failing that, keep calling them until you get through to somebody decent! I really don't have much good to say about Tui, from my experience the last 12 months,