As I know, if we want to integrate to Payment Gateway, at least we must have a 3 files, Request Payment page, Back-End Page and Response Page.
Could you inform me where that files put on your theme as payfast & stripe?
and and which files are associated with existing the payment gateway integration?
We want to launch our site soon. So I must make sure this easy payment gateway can be done integrated with your theme.
Please keep in touch to make it come true.