Correction, I did get the e-mail, but still no coins!
same here! I bought two cartel coin packages via paypal (5:55 pm CET), mails arrived to both transactions (one from swtor and one from paypal for each buy; i can deliver the bill numbers if needed), but my cartel coin account is still the same. As well ingame as on the "My Swtor" site.
This morning (before the maintenance), I already purchased two packages of cartel coins. These transactions were 100% correct, the coins instantly were on my ingame account.
Edit: Server is Red Eclipse, if that matters.