After completing the payment, you can download the license and obstacle files directly from the Order Completed page. You can also find the download links on the My Account page, both under the 'Orders' tab (ZIP files with all ordered licenses) and the 'Devices' tab.
When you complete an order of an MCA in the webshop, you will receive an email with the MCA and a separate email with the invoice. If paying via PayPal, you normally receive a separate email from them as well.
The emails from us are sent automatically by the system the instant you complete the order. If you haven't received one or more of the emails, they are probably in you spam folder so you should check there. A few email providers (e.g. one.com) are infamous for deleting emails instead of putting them in the spam folder of the user, but there is usually a way to turn this unsatisfactory function off in the email account settings.