correct the function of payment gateway added to cakephp based script

We added a payment gateway to our cakephp script, but there are many bugs: 1- When a product is purshased, it is not added to boughtitems table in the database 2- When a customer purshase a membership it is not added to membership_users table in the database. 3- When a customer buy a bidpack or a membership, he take a number of rewards points. 4- When the customer buy a bidpack or membership pass and want to buy an other time this bidpack or pass he cannot!!! he must be able to purshase bids as many as he want, but he must pay for an auction only one time! 5- The main problem, When the customer go to the payment page, and go back to the website without paying he take bids and rewards points and the statut of the auction change to paid!!!This must be done when he pay!!! This is related to the payment gateway, the code in the payment_gateways_controller file. ## Deliverables 1) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No 3rd party components unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the worker's Worker Legal Agreement). ## Platform Cakepahp