Sorry to hear you're still waiting for your order. This seems to be a recurring theme. We have suggested to some previous commenters that stock looks a little better with Carphone Warehouse or Mobiles.co.uk - both will let you upgrade your Vodafone contract. Do keep sharing any updates you get from Vodafone, we've tweeted them to ask if they can tell us when they expect stock to be released. We'll share any news here too.
iPhone Stock Checker