Fast troubleshooting + clear escalation.
The Short Stack
On the web: hard refresh; sign out and back in; another browser; try again.
In the app: check whether the offline banner is showing (your work is saved on the device and will sync); force-quit and reopen; sign out and back in; confirm you are on the latest version.
Page, steps to reproduce, hand history, screenshot, device/browser.
Include your account email, and tell us whether you subscribed on the web or inside the app. App Store subscriptions are billed by Apple, so cancellations and refunds for those have to go through Apple.