Greetings of the day!
We apologize for not being able to respond earlier.
We have checked the payment and its working fine for us.
The error you may be facing because of a wrong billing address.
Can you please try again and if you still face any issue May we request you to provide us a screenshot?
Please check with your bank and confirm if your online banking is active. Pro-designs payment gateway is working fine, I purchased theme a few days back and activated on my site – check https://outdoorballpro.com