Using Classic Outlook on Windows for personal email, calendar, and contact management
Agreed, this is very poor customer service on Microsofts part...
I am sure far more than those commenting here are struggling with the same issue and hardly a difficult scenario for Microsoft Dev's to replicate.
Based on the lack of response I am guessing they currently have no method of removing just the Outlook Classic element of the Microsoft Office 365 App package. Just a shame they cannot at least provide that information along with a time line for a fix.