Limited to 10 emails Books

We are only able to add 10 emails to the Organizational Profile within zoho BOOKS which is a problem because;

We have found the zoho BOOKs integration with CRM has these issues:

Users can not select a zoho BOOKS Estimate template
Users can not select a zoho BOOKS Estimate email template.
The default Estimate email template body of text contains all the HTML code making 'impossible' to review.

so we tried to fallback on sending estimates from within BOOKS and could only get ten emails in the system when we have more people quoting (emailing estimates).

Now what do we do?