Purchasing Credits
One of the payment options is to use credits. To purchase, click on the 'Purchase' tab to the left hand side and then click on the 'Purchase Credits' button in the top right corner.
This will take you to a new screen from which you can purchase credits.
Once here, from the dropdown menu choose the package you wish to purchase credits for.
Next, insert the number of credits you wish to buy, in the 'QTY' field. This will show you the cost of the credits, and you can proceed to checkout.
For advice on how to use credits please visit: Using Credits