Once a customer places an order I want the ability to change there order (eg add shipping, delete out of stock products from the order or offer order discounts) before a credit card is charged. Once the order is confirmed I then need to be able to press a button and the payment is then run through a chosen payment gateway (such as PayPal or my own merchant bank).
If have looked through the admin section of OpenCart and can not see that it can be done and google gives me nothing. I assume some sort of mod could do this.
Can anyone please point me in the right direction