Individual subscriptions converted to enterprise account

I currently have 10+ individual Adobe DC Pro subscriptions for my employees that I have an agreement on each one for a year and that I pay monthly using a credit card.  I spoke to an Adobe representative 2 weeks ago and they suggested I convert my individual plans into an Enterprise plan so I can administrate the accounts.  I want to do this because I have some employees who have left our company and I'm still paying for an account I can't use because I don't have their login credentials.  The rep I spoke with took my info and said someone from Enterprise would call me.  It's been two weeks and no phone call.  I've searched online trying to find help with no luck.  How can I get this done?