Miscellaneous topics that do not fit into specific categories.
This forum is just a user to user forum, no-one here can access your case number, you would need to contact Microsoft support again and quote that case number to continue the support.
Please provide full details on the problem you are experiencing with Microsoft 365, is it a problem using the Office apps or a subscription based problem, also, please provide a screenshot of any error you may be seeing and please ensure no personal details are included in the screenshot.