Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
I sympathise. I’ve never found an email to register an enquiry, a common complaint in this thread. I have though found the chat function does work and can speak to a human though that requires patience as the customer service advisor seems to only read from a set script and is a bit lost if your question is not on their notes. But if you persevere that usually works.
I have mentioned before if you have paid for a product that doesn’t work and have paid by credit card you have legal protection, at least in the UK and your card provider can take this up with Microsoft, if you have the time for that as a last resort.