Last time, I didn't get my CSC because a mySql error popped up, and I was able to ask for help and recieve my credits.
This time, that page with the Arid Feli and the suggestions of things to do while Subeta is down with the ErrorError mascot came up when my Paypal screen tried to go back to Subeta. Does this also usually mean credits don't go through? ): 'Cos I don't have the screenshots of Paypal like I did with the mySql error, and I don't want to sit tight anxiously wondering whether my $15 vanished if someone could tell me definitively... :C
I suggest filing a ticket about it. If you have the paypal receipt for the payment but not the credits I'm pretty sure that will do. And if paypal took the money, you should have a receipt.