When generating a CSR for a wildcard TLS/SSL certificate you have to ensure the domain is in the correct format.
This means you have purchased a wildcard SSL certificate but your CSR does not contain a wildcard domain.
When you generate your CSR or enter the domain during the order process make sure you include the wildcard element. For example a wildcard certificate for Servertastic would be in the format *.servertastic.com
Once you have completed your order you can access the relevant intermediate CA from the order management page. This will ensure you get the appropriate intermediate certificate.
Due to strict validation requirements set down by all Certificate Authorities wildcard EV certificates are not available from any provider.