Subscription Issues

For the anniversary day of your subscription, look here: https://account.adobe.com/plans

You can cancel without fee during the last month of your subscription. The deadline is obviously the last day of your subscription (to be precise, the last minute, as renewal is timed on the exact time you took the subscription).

You can cancel, however, anytime, by paying a cancellation fee of half of the remaining due.

By cancelling, you will lose access to unused credits after the subscription ends, so be sure to have used all credits for any asset you still want to licence.

Cancellation instructions may be found here: Cancel your Adobe Stock membership 

If you need help, you can contact Adobe Customer Service. Adobe customer care can be contacted by beginning a secure chat session at https://helpx.adobe.com/contact.html?rghtup=autoOpen. Pop-up blockers need to be disabled! If the chat window fails to open, or is non-responsive, use a different device to start the interaction.
Support phone numbers may be found here: https://helpx.adobe.com/contact/phone.html. Please note that phone charges may apply.

(see also here: https://community.adobe.com/t5/creative-cloud-services/how-to-contact-adobe-support/td-p/11875703 or here
https://community.adobe.com/t5/account-payment-plan/how-to-contact-adobe-support/td-p/11843852)