Right after I pre-ordered the album, I got my receipt. It told me what I pre-ordered, the price, and that it's "pending" meaning it's not shipped yet. Once it is shipped, the receipt will update and tell you. Plus there's a section named "Tracking #" so I guess you get the tracking number so you can track your package. But I think it's ok if you deleted your receipt just wait for your package or if something is wrong, they'll probably email you.
Also if you want to contact customer service here it is: customerservice@bandmerch.com