Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
That the MS agent both didn't seem to understand the question, and when pushed, responded to a different question I suspect is because they have a set Q&A sheet they read from and are not empowered to respond to any queries outside of their list, or just don't know. It's my experience too not just with MS but with other customer service departments, eg with Airbnb. It's more expensive to hire a team who can resolve things quickly compared to the risk of losing a customer.
The problem is that having used MS 365 for so long, and when it works it works well, it is difficult or time consuming to migrate to another platform if you have tons of folders and shared links to people and MS probably rely on that, or as someone else commented they are moving away from consumer products to focus on business users.
I mentioned in my original post on this subject that if you pay using a credit card this does provide you with legal protection if something is not paid or can't be resolved through customer service, at least in the UK.