When I filled out the form for a media server wowza license and went to choose paypal. I decided i wanted to go back and choose credit card payment. But it didn't take me back the page expired. So started again. This time i again choose paypal for payment. after i finished details. I didn't get an email or license key. I refreshed and did it a few times and nothing happened. I didnt see any error message.
The following day after submitting a ticket. I got a reponse in my email with license key and receipt. The issues has been resolved. But i think there is a bug in the payment system because looking on forum i see it has happened to others when they try purchase