the refund period applies to your intial trial only, not to a renewal.
in any case, check your account https://account.adobe.com to see what subscription(s) you have.
if you need help finding the account(s), use https://helpx.adobe.com/manage-account/kb/unknown-charge-on-bill.html
to cancel a subscription you must first fix all payment problems, https://helpx.adobe.com/manage-account/kb/fix-failed-missed-payment.html
to understand refunds and cancellation terms (in general) select your plan type (at the top of the page here), https://helpx.adobe.com/manage-account/using/creative-cloud-subscription-terms.html
for info on how to cancel your subscription, this page describes the few steps involved, https://helpx.adobe.com/manage-account/using/cancel-subscription.html
if you want to cancel but are unable to follow the steps described in the "how to cancel page", you probably have a payment error that you need to repair before cancellation is allowed, https://helpx.adobe.com/manage-account/kb/fix-failed-missed-payment.html