Microsoft offers several premium support options in addition to standard technical support for Dynamics 365 subscribers.  One of the newest is Professional Direct Support.  This plan is available for customers with 20 or more users. 

This support plan offers faster (one hour) response time and access to not only break/fix resources but help with " light advisory, upgrade and release readiness, case wellness, enhanced service incident
handling, and escalation assistance".

For more on Dynamics support options, start here.