You can't amend an order after placing it, but if you made a mistake or have changed your mind, you can cancel an order shortly after placing it by going to My Account here .
Step 1- Sign into your My Account.
Step 2- Go to your order history.
Step 3- Select 'Cancel Order'.
If the option is not there, then unfortunately the cancellation window has closed. After this time our warehouse team will already be working to get your order to you.