I have an existing site that now needs to use discount coupons. CCGV has been installed and works perfectly, but we cannot get it to work with the site's credit card payment processor. The site uses Monsterpay, which does not allow for discount coupons.
The fix needs to allow for the discount to be calculated before the amounts are passed to monsterpay. I am attaching the monsterpay file (called [url removed, login to view]) for you to look at BEFORE you bid.
This is a fairly simple and quick fix for someone who knows what they are doing.
Please only bid if you have experience, you are going to charge a realistic fee and you can complete this (without any glitches) within a couple of hours of being selected.