After making the purchase you have to wait few minutes (sometimes it takes more time, depends on the client location) till PayLane payment processor verify your credit card.
PayLane has to check if you are aothirized customer to pay with the credit card you used.

Then, after succesful verification, purchased license will be automatically assiged to your account.
You will get the confirmation mail, so then you can login to your account and navigate My Account -> Downloads to get files you bouhgt.