To cancel without a fee: you need to cancel the last month of your subscription. The early cancellation fee is half of the remaining due, so if you do not need the service for the remaining time, cancelling now would be more economical.
The trial is a free one-month trial for an annual subscription. If you do not cancel before the end of the free trial, you will get charged and you will have an annual subscription. The early cancellation fee is due to cancelling an annual subscription before the end of the term. During the first 14 days of your paid subscription, you can still cancel free of charge, and you will get refunded. Passed that date, you definitively have an annual subscription.
If you did not use the subscription after the free trial, contact Adobe customer service and negotiate a free of charge cancellation. Keeping a friendly tone helps. 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, you need to accept cookies! If the chat window fails to open, or is non-responsive, use a different device and/or browser to start the interaction.
For support via Twitter:
https://twitter.com/AdobeCare
(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)
Important: Adobe does NOT contact you unsolicited by e-mail or direct message. If you get contacted by direct message from a person, claiming to be an Adobe employee, look at that profile and look, if they bear the “Adobe Employee” marking under their name. Adobe support does not use Skype to give you support.
If in doubt, ask the forum.
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