I want to stop free trial and unsubscribe. I 'm trying for several days now due to internet problems inth area. The system keeps asking me to update my payment info and prevents me from canceling. Please cancel my free trial immediately.

I would like to thank you for all your answers.

Only you may cancel a subscription
-To Cancel https://helpx.adobe.com/manage-account/using/cancel-subscription.html

This is a public forum, not Adobe support... other users can't see your account to help
This is the correct way to contact support
https://helpx.adobe.com/contact.html?rghtup=autoOpen

- and enter AGENT in the box asking How can we help you?

use a mobile phone’s update (non-opera) browser with wifi disabled to

1. fix payment

https://helpx.adobe.com/manage-account/kb/fix-failed-missed-payment.html?linkId=100000254860002 

2. cancel: 

cancel subscription, https://helpx.adobe.com/account/individual/subscriptions-and-plans/renewals-and-cancellations/cancel-adobe-subscription.html 

understanding cancellation 

fees, https://helpx.adobe.com/uk/manage-account/using/creative-cloud-subscription-terms.html#cancel