Authenticate Feature for a website & payment gateway integration

Hello, I have developed my website on Wix. I am currently in need of someone who can help with the following: 1. Setting up Authentication Feature: • Each product that will be sold will be provided by a unique authentication code. They will have to come on the website and authenticate this code. Email address and mobile number should be taken along with the code. Once this code is authenticated, it is void. Following are the situations: • Invalid code entered: Message saying that the code entered is invalid • Correct code entered & entered for the first time: A page like booking confirmation should open up saying “Congratulations, your product has been authenticated. Please note that this code cannot be used again” • Correct code entered but the code has been used the previously: Error message saying that his code has been used in the past. Please make sure that the product has been purchased by a verified source. • Along with the authenticate code, optionality to provide feedback should also be there. This would open up a form which would roughly ask for the following data points: • Name • Email Address • Mobile Number • Source of purchase • Authentication code • Feedback • Etc • Based on this information that has been provided, a cashback of Rs. [x] would be initiated to the person purchasing the same. Payment Integration with an Indian service provider.