I just purchased some and they've yet to be credited to my account. Excuse my being impatient. Is there a bug currently and if so will I be credited at a later date?
CPs are not purchased, when you donate to SWC you are rewarded with CPs. This is a manual process so you need to wait for Veynom to process before receiving your reward.
Best thing to do is send an email to Veynom as hes the only one who can sort out the problem. Give him as much detail as you can so its easier for him to find.
Usually the CP's are instantaneous via paypal, but you need to give Veynom more than a day, maybe 4-5 days for a response, then send another email (if you haven't all ready) one just in case it may have gone to his spam e-mail or simply overlooked.