Hey there! Nice to meet you!
Based on your description, you will need to reach out to Microsoft Support for your refund request. You may contact them through these links:
Type "Request a Refund" > Click "Get Help" > Scroll down and select the option "Sign in to contact Support" > Microsoft 365 and Office > Billing and Payment Updates > Confirm > then select "Chat with a support agent in your web browser"
Phone Support: https://support.microsoft.com/topic/customer-service-phone-numbers-c0389ade-5640-e588-8b0e-28de8afeb3f2
Thank you for your kindness and understanding! Please feel free to let me know if you need anything else.
Best regards,
Darhyl