In my site because I'm using one bank for payment I want to delete payment step from checkout and when customer clicks the continue button in shipping method, review will show to customer and also the payment step done in backend. So after click order button in review step, customer will connect to bank for payment.
Also I want to do this without changing the core files because of update magento in future. But I don't know how can do this?
Thanks for help.
My question is different, now I have a problem that I now remove payment step but I want when I click the order button in review step it's connect to bank for payment but now it doesn't connect and after click order button in review step it shows me this page:
These are the files that I add to my site.
In which of these files I should make changes that with click order button in review button page connect to bank for payment?