Support
Email support@veconvert.com. If a conversion came out wrong, sending the source file and saying which machine it was for gets a useful answer much faster than a description does.
Bugs
The most useful bug report names the file, the settings, the machine, and what happened instead of what you expected. A file that cut wrong is worth reporting even if you have worked around it.
Business and volume
For API access, white-label use, or more conversions than a plan covers, email sales@veconvert.com with a rough idea of volume and formats.