Microsoft 365 features that help users manage their subscriptions, account settings, and billing information.
Hello, good day and thanks for your question. Sorry to know about this and I understand that you are unable to setup recurring billing for your Microsoft 365 subscription.
Another alternative for this is to try it on a different device and see how it goes from there.
If you will still encounter an issue even after trying out the alternatives, you can reach out to the support team at https://support.microsoft.com/en-us/contactus/ and then click on Microsoft 365 and then click Get Home Support and then type in Billing question and click the blue button that says Sign in to contact Support and login and proceed from there.