I need to merge multiple accounts

Hello, we apologize for the issue you are facing with merging your accounts. To merge your Rank Math accounts and ensure that all your Google services are using the same email, you will need to contact our support team.

Please follow these steps:

1. Navigate to the Rank Math Support Forum to open a ticket.
2. In the Ticket Title section, enter a brief summary of your request.
3. In the Ticket Question section, provide more details about the accounts you want to merge.
4. In the Sensitive Data section, include the email addresses you want to connect to your PRO account and specify which one should be the preferred email.
5. Make sure to include the email address you used to purchase the PRO plan or a screenshot of the invoice you received from FastSpring.com.
6. Click the SUBMIT YOUR TICKET button to send your request.

Once you submit your ticket, our support team will assist you in merging your accounts as requested. Thank you for raising this concern!

Sources:
I Purchased Rank Math PRO but Rank Math is Still Showing FREE » Rank Math