I ordered on the 11th and the date keeps moving. On Thursday I got fed up and cancelled the whole thing - and lo and behold, part of the order (not the calendar) is then notified as 'being despatched'. I replied immediately, reminding them of my request to cancel and got their normal, knobbish, we have a huge influx of messages right now... and we're sure you'll be delighted with your order when it arrives' nonsense.
The part order arrived today. It's unopened and I have a returns note printed out (free post) for Monday. I've contacted SpaceNK again, told them I'm returning it and NOT to send the calendar because that will also be returned unopened. It's more for my own record really.
From what I can see and have heard from other people who've bought the calendar, the contents are hugely variable in size and quality and I imagine what's happening is that SpaceNK are scrabbling around looking for 'stuff' they can fling in to the calendars to fulfil the orders. I would never buy from them again.
For anybody following suit not wanting their order - if it gets posted to you, don't refuse it, you'd have no proof that you did - accept it and go through the returns process. That's my advice and what I'm doing. 