Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
If you purchased it by mistake, contact support as soon as you can. Explain that it was a mistake. They will typically take care of you.
Go to https://support.microsoft.com/contactus, Type "Billing" and press Enter. On the next screen, click "Contact support" at the bottom of the page, then choose "Microsoft 365" > "Manage my subscription". You’ll then see the option to chat with a Microsoft support agent who has access to your account to help review the issue.
You can reference this detail step by step instruction with screenshots I posted in this thread: https://learn.microsoft.com/en-us/answers/c/2714817