Are you receiving unstyled email ?
Are tags also visible in the mails ?
Then, have a quick check here.
- Navigate to Woocommerce --> Settings --> Emails
- In the content type section, you can see the email type for each of the templates.
- Click on the necessary e-mail template and change the email type to HTML.
- Always make sure that all the email templates that you design through our plugin has HTML as the content type. Because majority of the email customisations will be accepted only when the content type is HTML.