Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
When they get you to hang up the can score another "fixed" problem ... (the manager reading their scorecard has no idea if it really was solved).
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When you have more than a trivial problem, when you call in ask for a trouble ticket number. That forces them to pay a little more attention. When you call back, give them the ticket number so they know this is not a new problem.
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When they promise to call back, force them to give you a specific date and time. If them miss the call, call them back immediately after the time window closes.
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Use the online chat method to contact them. Copy the conversation before closing the window. This way you have a date/time stamped transcript of the conversation. You can copy/paste when you get repetitive questions (like that never happens).