Wouldn't looking into a alt coin to do this process be more perceivable for what you are trying to achieve?
Token based using the ETH system of transferring the payments to be more a wise decision instead of looking for full integration of an already established payment system.
Thank you for the reply. I have never played around with Ethereum. Can you link or point me to something I can look at, to better understand this process ?
Or what is it called ?
Ethereum is the system to use your own payment system on top of.

Just like what others are using it for with the release of their tokens out to the public.
Just like this company did just in two months of it's release
https://bitcointalk.org/index.php?topic=1852294.0They have a solid foundation on what to work with and are releasing their very own payment system using the Ethereum technology.
Good luck to you on your ambition on getting your own payment system off the ground for your site.
