Promotional Credit remainder to be added as credit to user account
We're selling VPS hosting and we want to be able to offer a promotional code that gives the user Â£30.00 of user account credit.
In the system at present it seems to only do this by way of a discount of the price which leads to the following problem.
Code should only be applied once, VPS fixed package is Â£10 per month, code reduces that to zero, the remainder Â£20 is then lost as the code cannot repeat otherwise the hosting would be free for life.
What we need is for any unused Promo Credit (not discount) to be added to the Users Credit balance for usage against future invoices.