The TrueCommerce Online Help and Account Management Portal (AMP) have a robust knowledge base which can provide guided tutorials, downloadable documents, and answers to many of your questions. If you need to work with a Support Specialist, you can submit a request via Account Management or call (888) 430-4489 or (724) 940-5520. In either case, choose option 3 for Technical Support, or option 2 for Billing Support.
Note that for the most time-sensitive issues, calling will yield the quickest assistance, as your call is routed directly to a Support Specialist.