Not able to purchase Advanced Edge Certificate

I am trying to purchase the Advanced Edge Certificate ($10/mo) and it keeps looping me back after making the purchase as though I never purchased it. Is there something I am doing wrong?

This seems related to an ongoing billing migration. Can you try in incognito mode and see if that resolves the issue?

If not, can you create a Billing ticket and share your ticket number here? You can open a Billing ticket here, https://dash.cloudflare.com/?to=/:account/support