From delivery on 5 January being changed to 10 February

<p>I placed an order on 30 December 2016 for a laminator that was "in stock" when I ordered it. Estimated delivery was 5 January 2017. Now I am told that the item is out of stock and I must wait 20-25 working days in order for it to be delivered. How is it possible that I ordered an "in stock" item yet there is no stock available? Estimated delivery is now 10 February 2017. I am a teacher and school starts on Monday 9 January. How am I supposed to laminate my resources for my classroom?</p>