Incorrectly assigned AWS Activate Credit

Hello.

Once AWS Active Credits are applied, they cannot be transferred to another AWS account, so normally this can be avoided by adding the account to which credits were applied by mistake to an AWS Organizations member account and setting up cross-account sharing.
https://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/useconsolidatedbilling-credits.html

In your case, the AWS seller is different, so the workaround using AWS Organizations cannot be used.
https://docs.aws.amazon.com/organizations/latest/userguide/orgs_manage_accounts_invites.html

All accounts in an organization must come from the same seller of record as the management account if your organization's management account was created by Amazon Web Services India Private Limited ("AWS India") (formerly known as Amazon Internet Services Private Limited). For example, as an AWS seller in India, you can invite only other AWS India accounts to your organization. You can't combine accounts AWS India or from any other AWS seller.

Therefore, I recommend opening a case with AWS Support under "Account and billing" to see if there is another way.
Inquiries under "Account and billing" can be made free of charge.
https://docs.aws.amazon.com/awssupport/latest/user/case-management.html

Would you be open to convert your personal AWS account to the company AWS account? This happens quite often it you're starting a new venture. In our case we simply changed the AWS account email to our company email, and converted the account into a Org management account. We moved all production workload under this org, and thus started getting benefits of AWS active. https://docs.aws.amazon.com/accounts/latest/reference/manage-acct-update-root-user.html