How can I cancel a MacBook order if there’s no cancellation button showing?

Hello,

I was trying to buy a MacBook, and since I am in Germany, it led me to Zinia check-out for installed payments. I haven't completed the process as something came up. Later, I checked my shopping cart and it was empty, so I ordered a new one. I checked my orders page after that and realized that I had two MacBooks ordered. But as I said, I didn't complete my order with the first one. Their website and many answers to this question say that I can cancel unprocessed orders, but the thing is, there is no cancellation button. At worst, I will not pick up the accidental orders, but is there any way that I can cancel these orders by myself?

I really don't understand why they don't have a cancellation button, even though I scrutinized the whole page.

[Re-Titled by Moderator]

Original Title: There is no cancellation button for the purchases