Hello,
Your subscription status is set as Free. It seems like you purchased the PRO subscription with some other email address.
Can you please search and forward a receipt from FastSpring.com so we can locate your account?
Also, you get 5 free credits with the Free plugin. Please head over to your WP Dashboard > Rank Math > Dashboard > Help and disconnect & reconnect your Rank Math account.
After doing so, please head over to your Content AI and refresh the credits count again so the plugin will request the updated credits from our server and displays the correct one.

Looking forward to helping you.
Hello,
Since we did not hear back from you for 15 days, we are assuming that you found the solution. We are closing this support ticket.
If you still need assistance or any other help, please feel free to open a new support ticket, and we will be more than happy to assist.
Thank you.