Hello,
It looks like the purchase was made from your account linked to email ID (shared in sensitive data)
You can log in using that ID at https://rankmath.com/my-account/
Alternatively, you can reset your password from the same page as well.
We can also merge your accounts if you prefer. We just need your preferred email ID for that and we will keep only that one active.
Once you are logged in, please check this guide on how to activate your PRO license on your website: https://rankmath.com/kb/how-to-upgrade-to-rank-math-pro/
Hope that helps and do let us know if you want us to proceed with the account merge.
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.