20-10-2013 06:40 PM
20-10-2013 06:49 PM - edited 20-10-2013 06:50 PM
Credit and membership are two different things.
You need membership to use any outgoing services.
If you just topped up your credit balance then that is not sufficient to use outgoing services/
You still need to buy membership - which you can pay for from your credit balance.
These FAQs might be of help to you:
Hope this helps.