How do I require that the Stripe payment is approved (validated) before user view the next screen of a form?

On my form, the user the ability to download a document (via webmerge) ONLY after they have successfully made a payment.

I can't figure out how to prevent the user from visiting the next page where they can enter their email (which sends them the document) if the stripe payment has not gone through (ie: it has not been denied). When I indicated that the stripe payment field is required, if the user inputs anything into the Stripe fields they can proceed. I need it to be that only if they enter correct information (and their order is processed) can they continue. 

My second question is, where can I write a response to users who have been denied. A simple "there's been an error with your card. please try again." is what I'm after.

Thanks

It seems you have opened several threads with the same issue. Please see my colleague's response on your thread here: https://www.jotform.com/answers/1179252.

Regards.