I paid for subscription but it still says I'm a free user and I'm unable to access some features
I hope you are doing well. I am sorry for the trouble.
I checked your email address registered here in the community and cannot find an active subscription for Acrobat Premium.
If the application is unable to identify the subscription, you may try a few steps below:
1. Logout from Acrobat Reader Mobile;
2. Restart the device;
3. Log in back to the device.
If these do not work, you may try restoring the subscription. Please refer to the link to learn how to restore the subscription: Manage subscriptions — Acrobat for iOS Help (adobe.com)
Also, you might want to check if you are logged in using Apple ID and not Google.
Let me know if this help.