How can I change the size/color/version of a purchased item?

Right now there's no option to switch the size/color/version — you'll need to cancel the original order and repurchase the item.

Here's how:

On the website:

1. Go to My orders.
2. Select the order from the list.
3. Select Cancel order.
4. Select the cancellation reason, then – Confirm.

N.B. You have only two hours to do it, while the order still has the Paid status.