charged longer than annual plan

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)

The plan you signed up for automatically renews each year. The cancellation fee is 50% of what is left to pay in the current year. To cancel without a penalty you must cancel in the 12th month of the first or later year.  

You can discuss this with Adobe by CHAT or PHONE if you want to see if they will be generous. WARNING, I emphasise CHAT or PHONE. People will now contact you privately offering Skype or email support - but they are scammers and your problems could get a whole lot worse. Use only Adobe's contact page.