Anyone can tell me how I can edit payment function

[cdkey]

Hello guys I want to help please I want make payment automatically someone say to me use the cron job and other one say to me this function I want make automatically payment  any one payment done the payment go to payment accept automatic and if any one close or cancel the payment go automatic to cancel this not in prestashop 1.7.6 I have store for selling digital  products and I dont login every time to control on payment from back office to sent file product to customer