Orders can't be deleted, but can be hidden. If it's the web version of Buydo you're using, contact our support team — we'll help you out. The Android and iOS users won't need our help, this option is available in the app.
Here's how you can do it there:
N.B. Don't hide the orders you're yet to receive! Otherwise you might miss the warranty's start/end, which may not allow you to request a refund in case they don't arrive.
If you'd like to un-hide those orders later, get in touch with the Buydo support team.
By email (firstname.lastname@example.org) or by clicking on the button below.