I could not use pro features

check your account to verify your subscription is what you expect and to verify your adobe id, https://accounts.adobe.com

then, if your subscription is what you expect, sign out and then back in to your cc desktop application using the same adobe id used to verify your subscription: http://helpx.adobe.com/creative-cloud/kb/sign-in-out-creative-cloud-desktop-app.html

if your subscription is not what you expect, contact support per @Manan Joshi 

Which plan did you subscribe? 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
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?rghtup=autoOpen
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