Paypal payment digital delivery needed like ejunkie s

We have multiple digital products we offer. When a customer purchases one from our website they pay with paypal. The email of their order gets sent to a email account where we manually have to email them the digital download links. We would like to automate this whole process on our sites. We tried e-junkie though it did not work well. Since when the customer clicked buy now it went to ejunkie first then paypal, and also the link would produce a pop-up window. E-junkie sometimes did not even work. When a customer orders and the order is complete they should be forwarded to a complete order page in which it tells the customer to check their email for the order. The email should be sent automatically to the customers email(they enter this when they order) with the fixed download links. PM for more info. Thanks you.