Hello,
We apologize for the issue you are facing with your subscription email. Unfortunately, we cannot directly switch subscriptions between emails. However, you can manage your subscription through your Rank Math account.
If you need assistance with this process, please reply to this ticket, and a human agent from the Rank Math Support team will take over and help you further.
Thank you for raising this concern!
yes please Because in your first video tutorial you explain we need the same email subscription like your WordPress
Hello,
Thank you so much for getting in touch.
We have transferred your purchased AI credits to this account other email account.
Now, please update your Rank Math Plugin to the latest version: https://rankmath.com/changelog/
You can disconnect your account by navigating to WordPress Dashboard > Rank Math > Dashboard > Help and then simply disconnect the account by clicking on Disconnect Account.

Once you’ve disconnected your Rank Math account, you can connect it again in the same settings. In order to connect your correct account, click on Connect Now.

Once you click on Connect Now, please ensure that you’ve selected the correct account and then click on OK, Activate Now, as shown below.
FREE 
PRO
Then head over to WordPress Dashboard → Rank Math → General Settings → Content AI and refresh the credits. Here’s a screenshot for reference:

Once done, please go back to using Content AI and it should work without any issues.
Lastly, to avoid any confusion in the future, would you like to merge these two accounts?
If so, please tell us the preferred email address and we will do the needful.
We really look 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.