GMAJOR Support - How to reach them?

Urgent guidance needed regarding GMAJOR support channels. We've encountered a critical platform issue impacting our Q4 order processing and need to escalate it immediately. What are the most direct and effective ways to reach GMAJOR support for a rapid resolution? Specifically, are there dedicated lines or priority queues for urgent operational disruptions, and what's the typical response time we can expect via email versus phone? We've tried the general contact form, but given the severity, we need to ensure we're utilizing the optimal path for swift assistance.