CCbill - trial payment available only once to each member - Quick job - repost

We have a adult niche dating site using ccbill. Currently the site offers a trial for 3 days for members that is paid at a minimal price. We want to make it so the trial pricing for 3 days is only available to each user once, after that they must choose one of the other payment options or go directly to the monthly price. This feature on CCbill is called Limit Customers to one trial subscription banking rule on ccbill, however, checkout forms will also have to be modified accordingly so that the trial no longer shows up for them on the checkout form and upgrade pages. Bidders must be familiar with CCBill and be very confident, the site is popular with thousands of users so any issues must be avoided to avoid serious issues. If developer performs well we will have additional projects