We have an expert team that manages questions specific to CyberSource. Please reach out to the CyberSource team directly.
CyberSource Support - 800-709-7779
Currently, the only method to properly query the CyberCource Payments sandbox is creating a merchant account directly with CyberSource: https://developer.cybersource.com
Luckily, their site also provides an easy to use method to test their account credentials:
Additionally, here are the following links for sample code: https://github.com/CyberSource/cybersource-rest-samples-java/blob/master/src/main/java/samples/payme...
We have an expert team that manages questions specific to CyberSource. Please reach out to the CyberSource team directly using the phone number below.
You can also try going to the CyberSource Support page here - https://support.cybersource.com/s/article/How-Do-I-Contact-CyberSource-Customer-Support
However, I think calling CyberSource Support directly would be best. You can also try to make the phone call using VoIP and see if that works.