Trying to make a forms to sell Gift cards and having trouble

Hello, I am having trouble making a form to sell gift cards. The problem is with the payment section. Can you please walk me through this ? Thank you 

We will be glad to help you with your concern. However, may I suggest that you check this guide first, please?

Mastering-Payment-Form-Integrations-with-JotForm

Then, if you have any further questions, please feel free to contact us again anytime.