Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
If you cannot locate the charges on your Microsoft account at all, it's possible that your credit card/payment method has been compromised. This means unauthorized charges may have been made on someone else's Microsoft account using your credit card.
In such a scenario, you should contact your credit card company/bank to open a dispute case. I am actually surprised that MS support told you they couldn't find an account associated with your credit card, because support doesn't have authority to look up other people's account based on credit card. They can only look up YOURS. That's related to the privacy policy. Microsoft is unable to directly investigate issues related to someone else's account if you contact their Billing Support directly. However, once a dispute case is initiated by your credit card company, Microsoft can then respond specifically to those claims through the dispute process with the credit card company. This is the appropriate channel to resolve such issues, as it ensures proper verification and handling of the unauthorized charges.