You can obtain free community support for example through stackoverflow, or also through the Symfony2 mailing list.
If you think you found a bug, please create a ticket in the bug tracker.
If you take code quality seriously, try out the new continuous inspection service.
A unified API for processing payments with Symfony
This bundle provides the foundation for different payment backends. It abstracts away the differences between payment protocols, and offers a simple, and unified API for performing financial transactions.
Once you followed the Setup instructions, if you have no prior experience with this bundle or payment processing in general, you should follow the Accepting payments guide.
Once you grasp how this bundle works, take a look at the Payment form chapter to learn how to customize the form.