Basically I got the following email stating that the pre-order price was incorrect (I paid £30 from the deal that was on this website) but they have given me a £10 off voucher.
Email is as follows:
Thank you for your preorder on GAME.co.uk for Go!Explore on the PSP. Unfortunately, it has come to our attention that this item was incorrectly priced at the time you placed your order. Game.co.uk endeavours to ensure that all pricing information on its website is accurate, however, on very rare occasions, errors occur and we are unable to confirm your order or despatch this item to you.
Please accept our sincere apologies for any inconvenience caused. We understand that you will be disappointed with this news and as a gesture of goodwill we'd like to offer you £10 off any future order you wish to place with GAME.co.uk.
Simply enter the following code XXXXXXX in the Offer Code box to the right of the Checkout page when you complete your order. We take the accuracy of the information on the website very seriously indeed and as a result we've added further checks to ensure that prices are as clear as possible.