How can i use the product

Revert to trial https://helpx.adobe.com/manage-account-membership/cc-reverts-to-trial.html may help
-and troubleshooting FAQ https://community.adobe.com/t5/Get-Started/Troubleshooting-FAQ-What-should-I-do-if-I-have-a-membership-but/td-p/7601068
-and https://helpx.adobe.com/creative-cloud/kb/cloud-website-shows-trial-purchase.html

What Product?  (Adobe has many!)

What did you buy?

Who did you buy from?

What did you download?

How did you download?

Do you have a subscription to an Adobe 'Plan' or App?