Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Greetings!
This is Tin, I'm here to help you. To do that, you will be needing to cancel your subscription with Apple. And once it's cancelled, you can purchase MS Office 365 from this link https://www.microsoft.com/en-us/microsoft-365/p/microsoft-365-personal/cfq7ttc0k5bf?msockid=0c89daa762ad6d4f0a10cb6363b96c24
Your files won't be lost, please be noted that your files on Onedrive is tied to your MS Account, so when you subscribe again, your files should still be there.
Thank you,
Tin