what to do if you can't pay for a subscription?

Is this related to the war in Ukraine?  If so, contact Adobe directly. 

Each situation is handled on a case-by-case basis.

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

YOU must cancel the subscription or it will continue to build up a balance AND it will auto-renew

To Cancel https://helpx.adobe.com/manage-account/using/cancel-creative-cloud-subscription.html
-READ THIS https://helpx.adobe.com/manage-account/using/creative-cloud-subscription-terms.html#cancel
-do be aware that cancelling early means paying 1/2 of the remaining subscription time as a fee
--this is cancelling AFTER the trial converts to paid and BEFORE the end of the subscription

Please go to Adobe Customer Service (make sure to sign in to your Adobe account first and allow popups on your browser):
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