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Unfortunately, Microsoft no longer offers phone support for home users. The available support channel is live chat. However, account recovery is designed to be fully automated. Even if you contact Microsoft Support, they will likely direct you to complete the account recovery form.
Do you still have access to any recovery methods, such as a phone number or alternate email address? If yes, you can reset your password here: https://account.live.com/ResetPassword.aspx
Otherwise, you can submit the account recovery form here: https://account.live.com/acsr
Complete the form using a device and location you have used before, and make sure to provide an accessible email address.
Microsoft typically reviews recovery requests within 24 hours. If your request is successful, they will send instructions to help you recover your account.
For help with the Microsoft account recovery form, see: https://support.microsoft.com/account-billing/help-with-the-microsoft-account-recovery-form-b19c02d1-a782-dee6-93c3-dc8113b20c42
You can submit the form up to twice within a 24-hour period, so you can include any additional information you remember with each attempt.