Click My Subscriptions in the top right corner of your dashboard. This opens the Billing page.
Choose Cancel subscription.
Confirm the cancellation when prompted.
Once you cancel, Ssemble stops all future renewal charges. If a renewal payment had already failed before you canceled, Stripe may send a few final retry attempts for that charge before your cancellation fully processes, then retries stop.
For details on confirming whether a charge went through, stopping lingering retry attempts, or removing your saved card, see Manage Subscription, Payment Method, Invoices.