Hello,
Thank you for contacting the support and sorry for any inconvenience that might have been caused due to that.
It seems like you purchased the PRO plugin with some other email address.
Can you please search and forward a receipt from FastSpring.com so we can locate your account?
regarding your credits, we can see them on this account so to use them you can follow these steps to reconnect your Rank Math account to the website.
Please head over to your WordPress Dashboard > Rank Math > Dashboard > Help, disconnect and reconnect your Rank Math account to fix the issue.
https://i.rankmath.com/ZvEfVb
https://i.rankmath.com/OZSwOw
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.