unable to cancel my subscription

That screen shot shows you trying to delete your Adobe account, not how to cancel the trial. You have to cancel the trial before deleting the account. Warning: if you ever want to subscribe to an Adobe product again, you will need a new email address. Adobe does not allow reuse of emails from cancelled accounts.

Meantime, this should tell you how to cancel your subscription/trial. I hope it helps.

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

I've moved this from the Using the Community forum (which is the forum for issues using the forums) to the Account, Payment, & Plan forum.

We can't do that here. Please go to Adobe Customer Service (Make sure to sign in to your Adobe account first and allow popups on your browser. You may not be able to see the chat window if using a VPN.):
https://helpx.adobe.com/contact.html?rghtup=autoOpen will automatically open the chat window.
Type "Agent" in the chat box to bypass the chatbot and be connected to a person.

You may also be able to contact Adobe by phone:
https://helpx.adobe.com/contact/phone.html