Customize Voucher/Coupon Module in Magento site

Hi, there, \r\n\r\nWe are looking for a Magento export to help on this customization on coupon module on our Magento Site:\r\n\r\nA. We want to make sure the voucher/coupon code to be regarded as redeemed/used only after the order is submitted successfully AND the transaction is completed: payment is confirmed (by PayPal) or preauthorized or captured successfully(by Credit Card). Currently the coupon code was marked used in system after customers submitted the orders, even if the transactions were not completed and failed to get payments with Pending Payment status on orders. \r\n\r\nB. Coupon System Redesign: Our current coupon system is the standard from Magento. We want to be customized with these features:\r\n a. The used coupons come with order #, customer name, Redemption time.\r\n b. Coupon code will be showed in order details. \r\n c. All used coupons can be assorted, viewed and exported (CSV and XML) by filters of redemption time, order #, customer names. \r\n\r\nWe are looking for a long term relationship for our three sites. Thank you for your time.