Sending, receiving, and organizing email in Outlook.com
Greetings!
This is Tin, sorry to hear that you cannot access your account to cancel your subscription. Since you're unable to reset your password, it would be best to reach MS Accounts & Billing to cancel the subscription for you. Please take note that they will have some verification process.
Kindly open this link: https://support.microsoft.com/contactus/
Ensure that your MS Account has been signed in (You can use other account from here, just to reach them)
Type "Chat with an agent" and hit Enter.
Please click the "Contact support"
Please select the "Products and services"
Please follow the prompts to connect with a live agent.
You may also choose the "Call me back" option if you prefer to receive a call.
Once you're connected to the Live Agent, please let them know about your issue so they could check your account and address your concern.
Thank you,
Tin