Hello,
Thanks for contacting us and sorry for any inconvenience that might have been caused due to that.
We have merged the purchase to the correct email address. Please reconnect your website to your Rank Math account by going to WordPress dashboard > Rank Math dashboard > Help > Disconnect and Connect.
Then, head over to Content AI and refresh the credits count so the plugin will request the updated credits from our server:

Hope this helps. Let us know if you need any other assistance.
Thank you so much for the quick support. It works now.
Have a great day
Elfi
Hello,
We are super happy that this resolved your issue. If you have any other questions in the future, know that we are here to help you.
If you don’t mind me asking, could you please leave us a review (if you haven’t already) on https://wordpress.org/support/plugin/seo-by-rank-math/reviews/#new-post about your overall experience with Rank Math? We appreciate your time and patience.
If you do have another question in the future, please feel free to create a new forum topic, and it will be our pleasure to assist you again.
Thank you.