1. From your home screen look to 'Credit Balance' in the top left hand corner.  The number indicated in green shows how many credits you have available. 
   e.g. 18.00 = 18 Individual NetCodes
   
   
    

2.  To expand on this, click on this option and you will be shown a more detailed breakdown of your balance, including when the code was requested, what type of request it was and whether the transaction added or removed a credit.

2. To purchase more credits simply select your package, select 'Checkout' and follow the instructions.