I am in the same situation. I have two subscriptions that I’ve been trying to cancel for months. Nothing happens when I click the “Edit” button.
I opened ticket #3262425 on May 15th. The times I am lucky enough to get a response back, the response is useless and does not help. I just need someone from Billing to cancel the account for me because clearly the UI is buggy.
This is now 3 months of billing that Cloudflare is scamming me on.