I need an expert to deal with the automatic payment gateway of my website for me -- 2

I bought a trading system source code. When I deployed this code to deal with the automatic payment integration problem, there was no callback problem. When I deposited the funds, the payment gateway did not call back to my website
In addition, I also hope to add a new function to my website to control the player's winning or losing function
https://bittrade.app
This website is made using Laravel