Subscriptions are 100% in your control, and you can modify, change, upgrade, or cancel a subscription from your customer portal. You log into the portal with the email you used to subscribe/sign-up.
The customer portal is located here:
https://subscriptions.knownkeep.com/p/login/bIY5m2ent3aLgIEbII
Should you have any issues or questions, just open up a support ticket here in this forum.