Hello !
This email is not a genuine Microsoft email. Fraudsters abuse the Microsoft Azure notification system to send you an email that includes a fake support phone number. This is the case here. Microsoft will never ask you to call a phone number to solve an unauthorized billing issue.
Real Microsoft/Azure billing notifications will always direct you to sign in to your official account through the Azure website, never by calling a phone number listed in the email.
You can safely delete this email, and report it as junk on Outlook.
Please let me know if you have any other question !