Hi there Jake (​@JakeDanesh)

If you contact them via live chat they should be able to sort this out. You’re not the first and won’t be the last one to do this.

This link shows how and when to get to their chat and if the live chat button doesn’t show:

Start the chat with speak to person to bypass their automated bot

Let us know how you get on (tomorrow now though)

Hi ​@JakeDanesh 

We’d recommend the same as ​@Daz_S above, please get in touch via Live Chat, Facebook or Twitter so that we can assist in getting the duplicate order cancelled.

Tom