Most plans are for a year, and there is a cancellation fee. So this isn't over. The charge may repeat every month until you cancel and pay the fee.... what exactly did you sign up for?

@Coral5EF9 

Contact your bank.

When you ordered a trial subscription from Adobe, they asked for your credit card details and you had to download and install the software on your device.  Are you saying you never gave Adobe your credit card and downloaded the software?  Or or are you saying you wanted the software but never intended to pay for it? 

After 7 days, the free trial reverts to a paid subscription plan until you cancel.  Did you cancel within the 14 day grace period? You should have received an email confirmation.  Did you receive the email confirmation?  You might want to check your spam folder.

This is a user-to-user community.  Fellow users can't help you with your account. But you can contact Adobe customer support by phone or online chat.  See links below for more details.

How to Cancel a subscription

https://helpx.adobe.com/manage-account/using/cancel-subscription.html

Subscription and Cancellation Terms

https://www.adobe.com/legal/subscription-terms.html

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CONTACT ADOBE SUPPORT:
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Online Chat: https://helpx.adobe.com/contact.html?rghtup=autoOpen
Phone M-F, during normal business hours: https://helpx.adobe.com/contact/phone.html