Service stopped even though i payed for 1y

1. Open CC Desktop App.
2. Click your Avatar > General tab > Settings. Select "Always keep Creative Cloud up to date."
3. Click on your Avatar again.
4. Sign-out of Creative Cloud.
5. Close all apps.
6. Restart your computer.
7. Open CC Desktop app.
8. Click your Avatar.
9. Sign-in with your paid ID and password.

Also see what to do when your paid plan reverts to trial mode:

https://helpx.adobe.com/manage-account/kb/stop-creative-cloud-trial-mode-after-purchase.html

May I ask where you purchased from and also what it cost? 

Try the steps mentioned in the following link
https://helpx.adobe.com/hk_en/manage-account/kb/stop-creative-cloud-trial-mode-after-purchase.html

There is also a minor server issue going on, this might be related to it. For updates on the status, see the following

https://status.adobe.com/
If it doesn't work, then you need to contact support.
Login to your account and navigate to the URL below. Make sure that the browser has cookies enabled, and all script blockers are disabled.
https://helpx.adobe.com/contact.html
Click on the chat icon on the bottom right, and type AGENT to avoid bots and talk to a human.
Also, be mindful of answering anyone who sends you a private message. See the following for more information about scammers
https://tinyurl.com/y7cfrr7y
-Manan