We are experiencing a technical issue that seems to affect people trying to checkout with more than 17 items in their baskets. 
We are working on a fix urgently and hope to get this implemented soon, in the meantime please bear with us
Please feel free to split purchases across multiple orders and select collect in store on any secondary order so as not to be charged shipping more than once.
Thank you for being so patient with us during what we know is any annoying issue.

The Team - Goblin Gaming