Account details are sent out instantly once payment is received for Shoutcast and AutoDJ accounts. If you have not received your details then there is a chance that your spam filter may have blocked the email. If this is the case then you can log in at https://secure.bellonline.co.uk to view your email histroy.
If you order transcoding or dedicated server hosting then there is a set up time, you will be contacted within a reasonable time.