First of all you need to purchase below payment gateway or you must have these payment gateway, then ask account manager to active it by email on firstname.lastname@example.org
Please follow below steps to configure Payment Gateway.
1) Go to eZee Configuration
On Display Settings page, select your desired Payment Gateway, as shown in screenshot below.
2) Once Payment Gateway has selected, will fill require information (Credential and other information) for selected Payment Gateway. To do that please follow below steps and screenshot.
Go to eZee Absolute Settings >> Others >> Payment Gateway Settings
And, fill required information on settings page.