Hello,
Thank you for contacting Rank Math and sorry for any inconvenience that might have been caused due to that.
In order to fix this, could you please follow the below-mentioned steps:
Can you please head over to your rankmath.com Account > Websites or visit this URL: https://rankmath.com/my-account/websites/?
Check if you are able to see the correct remaining credits. See my screenshot below for reference:

If the credit count is correct on rankmath.com Account > Websites, but is showing incorrectly on your site, then please follow the below-mentioned steps:
1. Please disconnect and reconnect your site to Rank Math. You can do that from WordPress Dashboard > Rank Math > Dashboard > Help.
Have a look at the below screenshot for your reference –

2. 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.
Have a look at the below screenshot for your reference –

Let us know how it goes.
Looking forward to helping you. Thank you.
Hi Kamlesh,
Thanks for the quick response.
I applied your suggested solution and it worked.
Thank you!
Rodger
Hello,
We are super happy that this issue is already resolved. If you have any other questions in the future, know that we are here to help you.
If you don’t mind us 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 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.