We send the email with the login details as soon as the payment is made, but sometimes that email ends up in the junk folder.
Please open up your email box and check each email category (Inbox/Update/Promotion/Forums) for the email with the Login details.
It’s also possible that the email ended up in the Spam/Junk folder, so be sure to investigate.
Please note that login credentials are sent to the email associated with your billing.