Hi @hamzamin,
I hear you, that is a very frustrating situation, but I’m here to help and have several ways to help you have success quickly.
The GiveWP plugin was designed to be flexible and extendable as much as possible, and this is the reason we have a lot of payment gateways available now. Barclaycard ePDQ, however, is not one of them right now because we still didn’t find demand for that.
However, there’s a feature request for what you’re asking about: https://feedback.givewp.com/feature-requests/p/givewp-should-support-barclaycard-epdq.
We are actively tracking user feedback to understand further the needs you all have. You can use the link to check in for updates or to provide additional details of your own. I would encourage you to comment on that post about the impact this would have on your organization. Information like that is always helpful for our teams to see. I’ve also linked your ticket internally, so if this feature request is developed, we can reach out to update you.
Give the post above a look, and let me know if there are any additional details you would like me to add. I want to ensure your need is as accurately reflected as possible, and I’m happy to include an internal note to our teams with any specific information you would like them to have.
Should you need to accomplish this now, this will require a bit of customization. We ourselves don’t work with customizations, but when our users require customizations, we always encourage them to reach out to Codeable.io because they are WordPress experts and there are dozens of developers with experience in customizing GiveWP.
Last but not least, if you have programming skills, we have a tutorial that gives you the initial rails to develop your own custom payment gateway integration. You can read more about it here https://givewp.com/documentation/developers/how-to-build-a-gateway-add-on-for-givewp/. Bear in mind that this is custom code and we cannot support it.
Please don’t hesitate to contact us should you need more instructions or other concerns.