Corporate license disappear suddenly.

We should have corporate license few more months, today suddenly disappear and account tagged as 'Free' instead of 'Corporate'.

Unable to contact support. Support chat/call is out side the office hours. For the global company I think support should be 24 hours, specially we pay highest level of account/support level.

I have left support ticket but no response. worry it assigned to the bottom of the list because of account tagged as 'free' account.

Help ? anyone know how to contact support to escalate?