You can update the email address on company details page under configuration module. However, if you want to modify the email id of activated company and seller admin user, in such scenario please raise a ticket to help@anchanto.com to support the team for further assistance to perform this changes from backend.
We hope the details above were helpful for you. In case you have any further feedback or any particular scenario was not covered in the above article, please feel free to share with us, and will be happy to take it up.