Stripe or Braintree Developer

General information for the business: Website listing
Kind of development: New program from scratch
Description of every module: Need a page with a button that charges the user credit card a certain amount through Stripe or Braintree.
Only that. No need to save users data.
Description of requirements/functionality: I have already a customerid. When they log in their account they have an option to pay for a service. If they want to pay, they hit the 'Pay' button (all on my code up to here) and a new screen opens (your screen) with some text explaining what they are paying for (that I can add later tho this page) and the button "Pay now".
From here on, you should send the one payment to Stripe/Braintree, process it and return a Transaction ID to my code to relate it with my customer.
I wasn't able to make it work :(
Specific technologies required: should be done in VS2013 - MVC - C#
OS requirements: Windows
Extra notes: