Testing & Fixing a Payment & Review System

E-commerce site's Payment system enables currently for product payment to go to admin who then splits it between seller and site owner(commission). We want this process to work automatically. That is, when a buyer pays for a product the payment should automatically split between seller and site's commission. For REVIEW system, if user does not buy a product he/she does not perform review; if he/she clicks on 'Add Review' button, a pop-up window alerts to buy a product to perform review. If a user buys a product, he/she gets automatic e-mail with a 'link' to perform review within some deadline. The seller may get an e-mail same time as buyer but the preferred option is for seller to get e-mail after buyer has performed the review or after expiration of buyer's review deadline. This way the seller would be responding to the buyer's comment. The issue I have is that when the e-mail is received by the buyer and the link is followed to perform the review, if buyer then clicks on the "Add Review" it is supposed to display the page to perform the review. Instead we see the pop-window alerting that the buyer has to buy a product to perform the review. I want this issue fixed. Otherwise every other elements described on the Review system are in place already.