Have you sent them just a plain email requesting return of item xxx under DSR?
This on the 14th:
"Hello,
Recently I purchased an EVGA GTX460 graphics store from your store.
Unfortunatey, it was unspecified on your website that this was in fact
a version 2 model, incompatible to use with the original gtx460. Could
I please return it and have the return costs included in the refund?
What do I have to do to return the item? MY order number is ******.
Many thanks,"
And this at 2 this morning:
"Hello,
I already sent an email to you regarding this on the 14th of June but
i am sending this second one as i never received a reply. Recently I
purchased an EVGA GTX460 graphics store from your store.
Unfortunateley, it was unspecified on your website that this was in
fact a version 2 model, incompatible to use with the version 1 GTX460.
Could I please return it and have the return costs included in the
refund under the Distance Selling Regulations. The item was received
on the 11th, i sent my first email on the 14th, and this is my second
email, both within the 7 working day requirement of the Distance
Selling Regulations.
My order number is *******. The Distance Selling Regulations state
that i can return this item if i cancel the contract within 7 working
days, even if the item has been used or opened. If you do not reply or
refund the cost of the item (including the postage cost of me posting
it back to you) i shall be forced to ask my bank to make a chargeback
for the original transaction.
Regards,"
Edit: Just realised I didn't mention DSR in my original email, woops I thought I had! The one sent this morning has though so I should be fine!