The best approach is to submit your question about product usare, payment problems, any kind of how-to question to:

https://app.topspin.net/account/artisthelp Artist support

This will inform our Artist Support team of your request and make sure they can keep track of your support ticket.

 If your customers are having a problem with their purchase or a digital download, the best path is:

Fan Support: https://app.topspin.net/account/help_public