Yes, we can integrate any payment gateway module to QloApps you required. And it will be a Paid Service.
The cost of the service depends on the efforts required to integrate the payment gateway.
But, we are also running an offer for our customers. If you buy any of our QloApps services billing to a minimum of 750 USD in total then we will integrate one payment gateway of your choice to QloApps for free.
You will have to provide the APIs of payment gateway for the integration if they are not open publically. And if the APIs are publically open then please share the link.
Our store has services for many platforms, to avail the offer you will have to make the purchases in the QloApps category only.
As we can check that you have raised a ticket also.
On the ticket, we found that you are using an incompatible payment gateway module.
Please note that any Prestashop payment gateway module will not work on QloApps as it should be.
We will have to make it compatible with QloApps.
No, a CS-Cart module will not work on QloApps as these two are completely different platforms.
If you want PayU payment gateway then we can integrate it.
For more details on Payment gateway check this topic: http://bit.ly/2B5tjew