Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Greetings!
This is Tin, I'll do my best to help. I understand that you would like to turn off the auto renewal of your subscription and request for a refund. First thing to do is to check in https://account.microsoft.com/services you can check there if a refund will be offered for your case. You may also reach MS Accounts & Billing Support in case you still have question about it:
Kindly open this link: https://support.microsoft.com/contactus/
Please sign in your account with the subscription, then click Microsoft 365 then choose Get Home Support. After that, please type Chat with an agent then hit enter. Scroll down and choose Contact Support, then please select MS 365 and Office then under Category, choose Billing and Account Profile question then hit next. You will see the chat option there.
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