Click Products on the menu above, then click on the product category, and this will give a list of products, input the number required (eg. 3) on the product and press the Add button. 

Now click on continue shopping or  click Checkout on  the menu at the top, choose your destination (U.K., Europe or Rest of the world) then the checkout screen will be displayed. To proceed to purchase your order, press the Buy Now button.

On the next screen your order will be displayed,  enter your information (card no., expiry date, issue no. (Switch only), address, then click Confirm Order. If there is a problem there will be information in red lettering showing which of your information has to be re-entered correctly.

Next click on the Confirm Payment at the bottom of the screen. This will go on to a screen showing your order has been accepted.

You have finished.